docs(x402): state the settle success criterion per billing model - #369

Running Vale across on the following files affected by this PR:

- .clinerules/nevermined-payments.md
- .github/copilot-instructions.md
- .windsurf/rules/nevermined-payments.md
- AGENTS.md
- agents-guide/check-credits.mdx
- development-guide/nevermined-x402.mdx
- integrate/add-to-your-agent/express.mdx
- integrate/patterns/charge-credits.mdx
- products/x402-facilitator/how-it-works.mdx
- skills/nevermined-payments/SKILL.md
- skills/nevermined-payments/references/autonomous-operations.md
- skills/nevermined-payments/references/client-integration.md
- skills/nevermined-payments/references/express-integration.md
- skills/nevermined-payments/references/mcp-paywall.md
- solutions/api-providers.mdx
- specs/x402-card-delegation.mdx
- specs/x402-smart-accounts.mdx

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agents-guide/check-credits.mdx:
	- 3:44      Did you really mean 'Nevermined'?
	- 101:29    Did you really mean 'stablecoin'?

development-guide/nevermined-x402.mdx:
	- 2:9        Did you really mean 'Nevermined'?
	- 3:15       Did you really mean 'Nevermined'?
	- 11:3       Did you really mean 'Nevermined'?
	- 13:1       Did you really mean 'Nevermined'?
	- 24:7       Did you really mean 'Nevermined'?
	- 35:1       Did you really mean 'Nevermined's'?
	- 35:130     Did you really mean 'Nevermined'?
	- 50:1       Did you really mean 'Nevermined'?
	- 52:8       Did you really mean 'Nevermined'?
	- 56:1       Did you really mean 'Nevermined'?
	- 58:45      Did you really mean 'Nevermined'?
	- 64:45      Did you really mean 'Nevermined'?
	- 86:16      Did you really mean 'Nevermined'?
	- 87:3       Did you really mean 'Blockchain'?
	- 90:8       Did you really mean 'Nevermined'?
	- 92:1       Did you really mean 'Nevermined'?
	- 96:36      Did you really mean 'Crypto'?
	- 122:3      Did you really mean 'Crypto'?
	- 215:14     Did you really mean 'Nevermined'?
	- 278:10     Did you really mean 'tx'?
	- 292:7      Did you really mean 'Nevermined'?
	- 339:10     Did you really mean 'payments_py'?
	- 393:106    Did you really mean 'crypto'?
	- 535:10     Did you really mean 'payments_py'?

integrate/add-to-your-agent/express.mdx:
	- 3:19       Did you really mean 'Nevermined'?
	- 61:35      Did you really mean 'Nevermined'?
	- 124:21     Did you really mean 'Crypto'?
	- 126:168    Did you really mean 'crypto'?

integrate/patterns/charge-credits.mdx:
	- 13:4      Did you really mean 'crypto'?
	- 34:7      Did you really mean 'paymentRequired'?
	- 58:48     Did you really mean 'payment_required'?
	- 127:9     Did you really mean 'base_credits'?
	- 209:10    Did you really mean 'dataclasses'?
	- 210:10    Did you really mean 'datetime'?
	- 307:10    Did you really mean 'dataclasses'?
	- 366:7     Did you really mean 'estimatedCredits'?
	- 420:9     Did you really mean 'estimated_credits'?
	- 499:10    Did you really mean 'fastapi'?

products/x402-facilitator/how-it-works.mdx:
	- 18:8      Did you really mean 'Nevermined'?
	- 20:1      Did you really mean 'Nevermined'?
	- 127:9     Did you really mean 'Nevermined'?
	- 156:10    Did you really mean 'payments_py'?
	- 253:86    Did you really mean 'crypto'?
	- 256:25    Did you really mean 'truthy'?
	- 355:10    Did you really mean 'payments_py'?

solutions/api-providers.mdx:
	- 7:219      Did you really mean 'hardcode'?
	- 9:1        Did you really mean 'Nevermined'?
	- 9:288      Did you really mean 'Nevermined's'?
	- 9:402      Did you really mean 'Braintree'?
	- 13:4       Did you really mean 'Exa'?
	- 13:61      Did you really mean 'Exa'?
	- 13:116     Did you really mean 'Exa'?
	- 15:3       Did you really mean 'Exa'?
	- 25:13      Did you really mean 'Nevermined'?
	- 43:96      Did you really mean 'Nevermined'?
	- 103:10     Did you really mean 'fastapi'?
	- 105:10     Did you really mean 'payments_py'?
	- 301:10     Did you really mean 'fastapi'?
	- 302:10     Did you really mean 'payments_py'?
	- 353:7      Did you really mean 'Nevermined'?
	- 355:21     Did you really mean 'Exa'?
	- 359:5      Did you really mean 'Nevermined'?
	- 373:75     Did you really mean 'Nevermined'?
	- 411:33     Did you really mean 'delegationId'?
	- 480:10     Did you really mean 'Braintree'?
	- 480:47     Did you really mean 'Braintree'?
	- 483:73     Did you really mean 'signup'?
	- 487:63     Did you really mean 'Nevermined'?
	- 509:28     Did you really mean 'Braintree'?
	- 516:27     Did you really mean 'SDKs'?
	- 525:5      Did you really mean 'Braintree'?
	- 525:42     Did you really mean 'Braintree'?
	- 527:6      Did you really mean 'Braintree'?
	- 528:5      Did you really mean 'Nevermined'?
	- 532:18     Did you really mean 'Nevermined'?
	- 536:15     Did you really mean 'Nevermined'?
	- 547:62     Did you really mean 'Braintree'?
	- 555:30     Did you really mean 'Nevermined'?
	- 557:91     Did you really mean 'embeddable'?
	- 557:364    Did you really mean 'Exa'?
	- 566:88     Did you really mean 'invitable'?
	- 567:154    Did you really mean 'realtime'?

specs/x402-card-delegation.mdx:
	- 3:87       Did you really mean 'crypto'?
	- 3:123      Did you really mean 'Braintree'?
	- 14:235     Did you really mean 'crypto'?
	- 16:5       Did you really mean 'Crypto'?
	- 17:139     Did you really mean 'Braintree'?
	- 17:183     Did you really mean 'Agentic'?
	- 43:232     Did you really mean 'cryptocurrency'?
	- 43:265     Did you really mean 'blockchain'?
	- 49:102     Did you really mean 'crypto'?
	- 51:103     Did you really mean 'blockchain'?
	- 55:140     Did you really mean 'Braintree'?
	- 64:27      Did you really mean 'PSP's'?
	- 65:101     Did you really mean 'Braintree'?
	- 79:144     Did you really mean 'Braintree'?
	- 80:57      Did you really mean 'Braintree'?
	- 80:282     Did you really mean 'Agentic'?
	- 86:252     Did you really mean 'crypto'?
	- 87:10      Did you really mean 'Agentic'?
	- 87:108     Did you really mean 'Nevermined'?
	- 87:132     Did you really mean 'requestor'?
	- 92:43      Did you really mean 'Braintree'?
	- 92:75      Did you really mean 'Braintree'?
	- 93:42      Did you really mean 'Braintree'?
	- 95:85      Did you really mean 'Braintree'?
	- 97:187     Did you really mean 'Braintree'?
	- 97:233     Did you really mean 'tokenization'?
	- 97:254     Did you really mean 'Braintree'?
	- 220:83     Did you really mean 'blockchain'?
	- 232:52     Did you really mean 'userId'?
	- 234:40     Did you really mean 'delegationId'?
	- 239:139    Did you really mean 'Braintree'?
	- 239:191    Did you really mean 'userId'?
	- 240:174    Did you really mean 'Braintree'?
	- 240:260    Did you really mean 'Agentic'?
	- 248:22     Did you really mean 'namespaced'?
	- 257:178    Did you really mean 'cardholder's'?
	- 258:95     Did you really mean 'Agentic'?
	- 264:260    Did you really mean 'Nevermined'?
	- 271:160    Did you really mean 'Braintree'?
	- 271:464    Did you really mean 'cardholder's'?
	- 393:97     Did you really mean 'tokenizes'?
	- 393:143    Did you really mean 'Nevermined'?
	- 446:5      Did you really mean 'Braintree'?
	- 459:91     Did you really mean 'Agentic'?
	- 630:52     Did you really mean 'blockchain'?
	- 639:54     Did you really mean 'blockchain'?
	- 679:156    Did you really mean 'Braintree'?
	- 679:184    Did you really mean 'Braintree'?
	- 759:29     Did you really mean 'blockchain'?
	- 759:59     Did you really mean 'userId'?
	- 795:269    Did you really mean 'Braintree'?
	- 798:5      Did you really mean 'Braintree'?
	- 798:369    Did you really mean 'Braintree'?
	- 801:103    Did you really mean 'Braintree'?
	- 820:30     Did you really mean 'Blockchain'?
	- 820:81     Did you really mean 'crypto'?
	- 829:100    Did you really mean 'crypto'?
	- 839:65     Did you really mean 'truthy'?
	- 846:167    Did you really mean 'Nevermined'?
	- 871:6      Did you really mean 'Nevermined'?
	- 880:37     Did you really mean 'Onboarded'?
	- 881:91     Did you really mean 'Agentic'?
	- 924:61     Did you really mean 'tokenizes'?
	- 924:99     Did you really mean 'Nevermined'?
	- 957:9      Did you really mean 'Braintree'?
	- 966:18     Did you really mean 'Braintree'?
	- 969:87     Did you really mean 'Braintree'?
	- 977:56     Did you really mean 'Agentic'?
	- 977:170    Did you really mean 'Nevermined'?
	- 977:194    Did you really mean 'requestor'?
	- 978:7      Did you really mean 'Agentic'?

specs/x402-smart-accounts.mdx:
	- 45:65      Did you really mean 'blockchain'?
	- 185:32     Did you really mean 'Blockchain'?
	- 437:87     Did you really mean 'blockchain'?
	- 439:14     Did you really mean 'Blockchain'?
	- 447:14     Did you really mean 'Blockchain'?
	- 455:18     Did you really mean 'Blockchain'?
	- 491:38     Did you really mean 'blockchain'?
	- 493:14     Did you really mean 'Blockchain'?
	- 497:14     Did you really mean 'Blockchain'?
	- 501:14     Did you really mean 'Blockchain'?
	- 507:158    Did you really mean 'tx'?
	- 507:169    Did you really mean 'tx'?
	- 645:65     Did you really mean 'truthy'?
	- 683:49     Did you really mean 'nonces'?
	- 703:61     Did you really mean 'allowlist'?
	- 719:16     Did you really mean 'Biconomy'?


Found 171 suggested changes across 8 files in 772.85ms