Replace the lingering v0.9 'Breaking Changes' alert with a concise v0.14
'DEPRECATION NOTICE' for SQLite (dual compatibility for ~3 months, then
PostgreSQL-only).
Move all database-specific instructions (SQLite + PostgreSQL) out of the
README into a new canonical docs/database.md covering:
- SQLite zero-config default (DATA_HOME / meshcore.db, WAL/single-host)
- PostgreSQL: DATABASE_* env vars, bundled Docker profile, production
role/database provisioning (mirrors the ipnet-mesh/infrastructure init
script), managed/external Postgres and DATABASE_URL
- Schema-per-instance (search_path) isolation for multiple instances on a
shared cluster
- Pointer to the SQLite->PostgreSQL migration runbook in upgrading.md
Update the README Multi-Instance Deployments and Scaling the API sections
to link to docs/database.md, and add the new doc to the docs list and
project tree. Add a pointer in .env.example and a Postgres note in
AGENTS.md.
Consolidate docs/upgrading.md v0.14: move the env-var/schema/provisioning
reference to docs/database.md (single source of truth) and keep only the
upgrade-time migration runbook and dashboard chart fix.
Louis King