fix(diagnostics): resolve superseded job failures

[munezaclovis]

Depends on #315 and #318.

Closes #307.

Summary

• persist typed success/failure outcomes for job diagnostic subjects in completion order
• resolve only failures covered by newer successful work or a matching healthy observation
• keep no-op update coverage limited to update assessment
• reset background error deduplication after verified recovery so identical recurrence is current again
• make status and doctor share the unresolved-failure policy, timestamps, and focused repair advice
• refresh verified Gateway health after ports:install or invalidate only PF-derived degradation before reconciliation

Commit structure

1. state schema and supersession query
2. daemon coverage recording and recurrence-aware deduplication
3. status/doctor unresolved failure output
4. focused PF repair health refresh

Tests

• cargo test -p state --test state_foundation
• cargo test -p daemon --lib jobs::tests
• cargo test -p cli --test status
• cargo test -p cli --test doctor
• cargo test -p cli --test ports
• cargo clippy -p state --all-targets -- -D warnings
• cargo clippy -p daemon --all-targets -- -D warnings
• cargo clippy -p cli --all-targets -- -D warnings

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[codspeed-hq]

Merging this PR will not alter performance

✅ 7 untouched benchmarks

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_{Comparing agent/resolve-current-job-failures (f2ff12d) with agent/unify-pf-diagnostics (898e44c)}