chore(deploy): remove dockge handling

[owine]

Dockge is retired on every host, so this removes what's left of it:

• the has-dockge and live-dockge-path inputs
• the HAS_DOCKGE/DOCKGE_PATH env vars and the Deploy dockge step
• the current docs: README, CLAUDE.md and the adding-a-new-host runbook

Historical plans/specs, the migration runbook (kept verbatim on purpose) and the dockge_default rationale in ensure-shared-networks.sh are left as written.

⚠️ Merge order

A caller that passes an undefined workflow_call input fails to start. Merge these first, before Renovate bumps their compose-workflow pin past this PR:

• owine/docker-piwine#1361
• owine/docker-piwine-office#283

docker-zendc is archived, so it never picks up a new pin.

Verification

• yamllint --strict is clean. actionlint reports only the known, CI-ignored job.workflow_sha items.
• grep -i dockge across the workflows, scripts and current docs finds only historical mentions.

Summary by Sourcery

Remove obsolete Dockge handling now that Dockge is retired on every host.

Enhancements:

• Remove the retired Dockge deployment support from the reusable workflow and update its current documentation and examples.

Documentation:

• Update workflow documentation to reflect the removal of Dockge inputs and deployment behavior.

Chores:

• Retain historical Dockge references where they are intentionally preserved.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Removes the retired Dockge integration from the reusable deployment workflow, including its inputs, environment wiring, and deployment step, and synchronizes the current README and contributor documentation. Historical specifications, the migration runbook, and the shared-network rationale remain unchanged.

File-Level Changes

Change	Details	Files
Remove Dockge-specific workflow inputs, environment variables, and deployment logic now that Dockge is retired on every host.	Delete the has-dockge and live-dockge-path reusable-workflow inputs. Remove HAS_DOCKGE and DOCKGE_PATH job environment variables. Delete the conditional Dockge compose deployment step and update deployment-phase comments.	.github/workflows/deploy.yml
Update current documentation to describe the workflow without Dockge configuration.	Remove Dockge from the deployment job and input documentation. Clarify that the retired Dockge inputs must not be passed by callers. Remove the Dockge example input and optional-input reference.	CLAUDE.md README.md

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[sourcery-ai]

Hey - I've found 1 issue

Prompt for AI Agents

Please address the comments from this code review:

## Individual Comments

### Comment 1
<location path=".github/workflows/deploy.yml" line_range="22-26" />
<code_context>
         description: "Absolute path to the live compose tree on the runner host"
         required: true
         type: string
-      live-dockge-path:
-        description: "Absolute path to dockge's compose tree (when has-dockge=true)"
-        required: false
-        type: string
-        default: /opt/dockge
       repo-name:
         required: true
</code_context>
<issue_to_address>
**Caller deploys fail to start**

When a caller still passes either removed input when this workflow version is invoked, gitHub rejects the reusable-workflow call before any jobs run because the caller supplies an input that is no longer declared, so that repository cannot deploy.

Merge the caller updates that remove both inputs before merging this workflow change.

Also at `.github/workflows/deploy.yml:39`.
</issue_to_address>

Sourcery assessment

Approval pending. 1 finding to address first.

Blocking findings: .github/workflows/deploy.yml:26

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[sourcery-ai]

🟠 High · Caller deploys fail to start

When a caller still passes either removed input when this workflow version is invoked, gitHub rejects the reusable-workflow call before any jobs run because the caller supplies an input that is no longer declared, so that repository cannot deploy.

Merge the caller updates that remove both inputs before merging this workflow change.

Also at .github/workflows/deploy.yml:39.

Prompt for AI agents

In `.github/workflows/deploy.yml` at lines 22-26:

**Caller deploys fail to start**

When a caller still passes either removed input when this workflow version is invoked, gitHub rejects the reusable-workflow call before any jobs run because the caller supplies an input that is no longer declared, so that repository cannot deploy.

Merge the caller updates that remove both inputs before merging this workflow change.

Also at `.github/workflows/deploy.yml:39`.