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- engineering-docs (superseded by 2026-03-29 archive) — no tasks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/specs/deployment/spec.md

@@ -42,3 +42,8 @@ terraform/
 - [ ] PostgreSQL and Redis not publicly accessible — VPC-internal only
 - [ ] `docs/devops/deployment.md` — end-to-end deployment walkthrough for AWS and GCP
 - [ ] `terraform.tfvars.example` provided for both environments — no secrets in version control
+
+## ADDED Requirements
+
+### Requirement: Local development guide exists at docs/devops/local-development.md
+The system SHALL provide `docs/devops/local-development.md` documenting the complete local setup using docker-compose for infrastructure and npm for the application server, including all service ports, health check verification, and the Dockerfile gap note.