[codex] Implement Phases 74-76 conversation recall

[pcharbon70]

Summary

• implement Phase 74 conversation provenance capture, runtime seams, and integration coverage
• implement Phase 75 bounded conversation recall, workflow adoption, and governed follow-up coverage
• implement Phase 76 bounded operator recall surfaces on repo detail and governed run detail, plus contributor/spec guidance

Validation

• mix test test/jido_code_web/live/project_detail_live_test.exs:1388 test/jido_code_web/live/run_detail_live_test.exs:1110
• npm run e2e:test -- test/e2e/conversation-ui.spec.ts --grep "repo detail memory recall links back to the canonical conversation route"
• mix spec.check --base HEAD
• mix spec.check --base origin/main
• git diff --check