docs(console): record the Forgejo migration and what it left behind

[ProtocolWarden]

The Plane → Forgejo migration ran off direct operator requests and was never tracked in the backlog, so nothing in .console/ tells a future session it happened or why the codebase looks the way it does now. This records it, plus the two things it left open.

Done entry

The recon finding that reshaped the whole plan is in there: Plane was never live on this host. Port 8080 belonged to an unrelated stack's status-service, the config carried the all-zeros placeholder project id, and every board-worker cycle had been logging failed to list issues for its entire life. The "drain to zero" the board spec planned for was vacuous — the cutover was not move the board, it was give the fleet a live board for the first time.

Also recorded: three lessons already in .console/log.md, all one shape — a measurement reporting something other than the truth. The "egress flake" was my own gate scripts leaking OC_EGRESS_SNI_STRICT=1 into pytest (that suite was always green). Worktrees lack the venv, the env file and the editable install, so bare python/ty there measure the main checkout. And an empty directory left by git rm is still an importable PEP 420 namespace package.

Up Next: CI runs ~1,830 fewer tests than exist

No longer hypothetical. #521 merged a new failing test because tests/test_dependency_check.py is in no CI job — CI was green, the council verdict was SUCCESS, main was red until #522. #513 was the same story a week earlier: an #509 regression sat unnoticed in tests/maintenance/.

Adding the suites is a one-line workflow change. What makes it a decision is that 6 tests in them are currently failing, so turning the gate on blocks every merge until they're fixed. The entry lists all 6 by name and proposes the sensible order: fix them, then add the suites in the PR that proves them green.

Up Next: audit on Forgejo Actions

The last line of the PR-adapter spec, blocked on an operator installing a forgejo-runner. Everything upstream is done — ForgejoPRClient is verified against the live instance, and pr_backend (default github) is the single switch that performs the cutover.

Verification

The entry's central claim is self-checked: the un-gated suites fail on exactly 6 tests, confirmed in this branch. Custodian audit clean, census OK, backlog at 32% of the OC2 500K limit.

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