V1 mostly complete except for some testing. Linting in the last step changed nearly every file which is why this commit is so larger.

docs/ver1/release_checklist_v1.md

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+# V1 Release Readiness Checklist
+
+Use this checklist before declaring V1 operationally complete.
+
+## A) Functional Readiness
+
+- [ ] Upload flow works for supported file types.
+- [ ] Worker transitions jobs through `queued -> processing -> transcribed|failed`.
+- [ ] Job detail displays immutable original transcription from `Job.text`.
+- [ ] Revision workflow supports create/update/view/delete for optional single revision.
+
+## B) Reliability and Error Handling
+
+- [ ] Error categories surface with actionable messages in UI/API pathways.
+- [ ] Failed jobs persist `error_detail` and terminal state.
+- [ ] Stale processing recovery verified on restart.
+- [ ] Retry/timeout behavior validated against configured limits.
+
+## C) Operational Readiness
+
+- [ ] `docs/runbook.md` reviewed and current.
+- [ ] `docs/migration_v1.md` reviewed and current.
+- [ ] Backup and rollback procedures tested at least once.
+- [ ] Incident escalation packet template is known to operators.
+
+## D) Quality Gates
+
+- [ ] Lint/type checks pass.
+- [ ] `pytest -m "not external" -q` passes.
+- [ ] Targeted external/provider checks executed (if credentials available).
+- [ ] Release evidence recorded in `docs/release_evidence_v1.md`.
+
+## E) Traceability and Documentation
+
+- [ ] `docs/requirements.md` aligns with implemented V1 behavior.
+- [ ] `docs/architecture.md`, `docs/schema.md`, and `docs/error_handling.md` are consistent.
+- [ ] `docs/traceability_v1.md` is updated with current implementation and test evidence.
+- [ ] `docs/ver1/ver1.md` phase status updated with evidence references.
+- [ ] REQ traceability evidence links recorded (tests/runbook/checks).
+
+## Release Sign-Off
+
+- [ ] Technical sign-off complete.
+- [ ] Operational sign-off complete.
+- [ ] V1 completion date recorded.