fix(ownership): fold repo casing in the ownership-reconciliation pr-fix reads like every other queue lookup #1370

The ask: Fold the repo through normalizeQueueRepo in both prFixQueueItem.findFirst reads in src/lib/ownership-reconciliation.ts so the ownership-reconciliation reads match the queue's canonical repo identity.

PrFixQueueItem.repo is canonicalized lowercase+trim on every write (normalizeQueueRepo, #1145; migration 20261008000000 backfolded the legacy rows), but both ownership-reconciliation reads match on the raw cached repository.fullName:

• src/lib/ownership-reconciliation.ts — the §8.7 commit-time re-check (repo: input.issue.repository.fullName)
• src/lib/ownership-reconciliation.ts — the bounded ladder scan (repo: repoFullName)

When the issue cache holds uppercase casing (GitHub's canonical casing can carry it), both reads silently find no row:

• the commit-time re-check misses an open PR-fix queue row, so a REVIEW_OWNED issue can be released while the queue still owns the PR, and the release path strips the agent/* label — breaking the "never release a review-owned claim" rule in docs/ownership-reconciliation.md;
• the ladder scan under-reports review ownership, so the derived state degrades without an error.

Issue #1357 fixed the identical read in src/lib/ownership-inspect.ts (fold the cached name through normalizeQueueRepo before the query, with a regression test asserting the query receives the folded value); src/lib/ownership-reconciliation.ts was outside that diff.

Expected file: src/lib/ownership-reconciliation.ts and its test. No data migration is needed (migration 20261008000000 backfolded legacy rows).