fix(extensions): keep legacy status listings readable

[ikunikun1145]

Goal And Delivered Outcome

• Outcome basis: Self-contained defect reproduced on current upstream; the same legacy-state listing failure appears in the Windows CI context described in ci: expose test stall stacks and bound fixture progress IDs #6458.
• Goal/source and gap: Keep older extension state rows visible to loopx extension list when they have no revision history. Status calculation previously resolved the active manifest before checking for a revision-bound proof.
• Observable before → after: listing a legacy enabled row returned an invalid revision-history error → the row is listed with no active revision, zero revisions, and doctor_verified=false. Regression: test_extension_cli_keeps_legacy_machine_state_without_a_global_registry.
• Issue/task and intended base: Related failure context: ci: expose test stall stacks and bound fixture progress IDs #6458. Implemented against loopx-project/loopx main at 3c681f1132fe719e01f75e5a41bfd854dfa9e346.

Author Declaration

• Written by: OpenAI Codex agent using GPT-6, under the direction of contributor ikunikun1145.

Implemented against

• Specification and revision: No written specification; the reproduced behavior in this PR is the basis. Current upstream main at 3c681f1132fe719e01f75e5a41bfd854dfa9e346.
• Criteria:

Criterion	Disposition	Symbol / path	Test or command
Keep legacy unrevisioned extension rows inspectable without treating them as verified	implemented	loopx/extensions/runtime.py	test_extension_cli_keeps_legacy_machine_state_without_a_global_registry

• Self-check before submission: Reviewed status, verification, and compatibility paths. Only status reporting changes; revision-bound readiness, catalog, and activation checks remain fail-closed.

Scope And Continuation

• Completed scope and remaining work: Legacy extension state remains visible through the status list; entries without revision-bound proof remain unverified.
• Slice boundary / successor: Complete within this scope.

Validation

• Tested revision: 31d3ba0c50f3f397ebf2ca47aac990cf817e775f
• Run state: finished
• Input classes: synthetic, public_fixture

Check kind	Result	Public-safe evidence / limitation
unit	passed	tests/test_local_state_migration.py and tests/extensions/test_extension_runtime.py: 150 passed, 3 skipped.
static	passed	Ruff, Python compilation, and diff checks passed for changed files.
static	passed	Current-base premerge gate: 13 selected checks, no failures or warnings.
regression_parity	passed	The targeted legacy-listing test failed on the unmodified base with the invalid revision-history error and passed with this change.
integration	blocked	Hosted GitHub Actions require maintainer approval; native Windows execution is left to repository CI.

• Coverage and gaps: The changed status projection and adjacent extension-runtime behavior are covered. Full repository tests and native Windows execution were not run locally; hosted checks are pending maintainer approval.

Frontend / Visual Evidence

• UI impact: none
• Before: N/A
• After: N/A
• States and viewports shown: N/A
• Source data: none
• Attention review: N/A
• Craft review: N/A

Type of Change

• Bug fix
• New feature
• Breaking change
• Refactoring (no functional changes)
• Documentation update
• Test update

LoopX Area

• Control plane
• Benchmark boundary
• Capability or extension
• Public docs or presentation surface
• Build, packaging, installer, or CI
• Host or runtime integration

Technical Direction

• Direction / acceptance reference: N/A.

Shared-authority RFC fixture impact

• Production-scale fixture schema: N/A
• Semantic dimensions changed: N/A
• Provider conformance arms run: N/A
• Read-only legacy/file/PostgreSQL three-arm rehearsal: N/A

Boundary Checklist

• The diff and PR body contain no private state, credentials, traces, internal links, or local machine paths.
• This change does not duplicate maintainer-owned benchmark work.
• The change is scoped to the reproduced defect.
• UI impact is marked none.
• Every commit includes a DCO Signed-off-by trailer.