chore(openspec): archive all completed changes, sync 14 new specs to library

Archived 4 completed OpenSpec changes (2026-04-02):
- phase-3-enterprise (100/100 tasks) — 6 Phase 3 capabilities synced
- devops-documentation (48/48 tasks) — 3 new + 1 merged capability
- bedroom-developer-docs (33/33 tasks) — 4 new capabilities synced
- engineering-docs (superseded by 2026-03-29 archive) — no tasks

Main spec library grows from 21 → 35 capabilities (+14 new):
federation, multi-tenancy, oidc, soc2, w3c-dids, webhooks,
database, operations, system-overview, api-reference, core-concepts,
developer-guides, quick-start + deployment (merged additive requirements)

Active changes: 0 — project board is clear for Phase 4 planning.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

openspec/changes/archive/2026-04-02-devops-documentation/proposal.md

@@ -0,0 +1,19 @@
+## Why
+
+SentryAgent.ai AgentIdP Phase 1 MVP is complete and `docs/developers/` covers API consumers. However, there is no documentation for the engineers who deploy, configure, and operate the infrastructure. A DevOps engineer joining the project today has no reference for environment variables, database schema, deployment procedure, security configuration, or operational runbook. We fix that now.
+
+## What Changes
+
+- New `docs/devops/` folder — fully separate from `docs/developers/` — containing a complete operational reference for DevOps engineers
+- System architecture overview: components, ports, dependencies, data flow
+- Complete environment variable reference: every variable, required vs optional, format, examples
+- Database documentation: 4-table schema, migration runner, how to apply/verify migrations
+- Local development guide: docker-compose infrastructure setup, service ports, health checks
+- Security guide: RSA keypair generation and rotation, CORS config, secret storage
+- Operations runbook: startup procedure, graceful shutdown (SIGTERM/SIGINT), logging, common failures and fixes
+
+## What Does Not Change
+
+- `docs/developers/` — not touched
+- Source code — documentation only
+- No new dependencies