Release forge 0.2.19: scoped SCM operations and retained execution evidence

[ancongui]

Prepare forge 0.2.19 with scoped existing-product changes, API-observed GitHub issue polling, and a bounded run-evidence reader/export. Current project membership and credential checks fence delegated actions and their final feedback writes. Operators can inspect and recover the original retained bridge result without submitting the completion again; an unavailable graph checkpoint still blocks continuation.

The release includes CLI, SDK and MCP access, native Agentic prompt templates, verified HTTPS knowledge bootstrap, narrow-screen consent fixes, an expanded polling operator guide and 392 freshly captured walkthrough images. The release dependency graph is unchanged.

Validation completed locally:

• Native PostgreSQL/pyfly acceptance: 21 evidence/product-change cases and six polling authority/transaction cases; eleven polling browser cases passed.
• Actual bridge/forge local network recovery: one original POST, immutable pending/terminal reads, no repeated submission and the graph hold retained. The worker result is explicitly fictional; no provider model ran.
• Studio: 295 unit tests, lint, formatting, TypeScript and production build passed. Canonical walkthrough: 36 cases and 392 images.
• Documentation: strict MkDocs build, discovery for 60 pages/cards, 19 auxiliary tests and 94 browser plus five Pages checks passed. Diagrams retain the unchanged 12px minimum; the new polling flow renders at16px in desktop/mobile and both themes. Python lint/format and mypy passed.
• Offline wheel/source build and exact payload checks passed against all 1,589 tracked files and 28 built Studio assets.

Full PR CI passes: 2,760 Python tests passed, 51 skipped and four warnings; 295 Studio unit tests and 578 Studio browser tests passed. Packaging checks and a fresh CI installation passed. Local Linux artifact-origin checks additionally verify the complete 150-tool MCP envelope, 228 templates, 16 FunctionModel schemas and unchanged six default grants; two PostgreSQL recovery cases pass with OpenAI3.31/PydanticAI2.56 against the wheel. Independent static review found no concrete defect in the reviewed integration seams.

Live GitHub acceptance is a separate gate; GitLab/Bitbucket live accounts, complete graph continuation, distributed Kubernetes execution and an AI-generated CRM are not claimed by this release. All application deployment and runtime acceptance remain local.