Add @asynccontextmanager lifespan to the FastAPI app that creates an
asyncpg pool (min=1, max=10, command_timeout=10 — D-050) on app.state.pg_pool
and a PgStore on app.state.pg_store when PRAXIS_PG_DSN is set, applies
pg_migrations on startup, and closes the pool on shutdown.
Graceful degradation (REQ-NFR-MT-01): if PRAXIS_PG_DSN is unset, the
server starts with a WARNING and pg_pool/pg_store are None. The learner
voice loop (SQLite PraxisStore) is unaffected. Auth/operator routes will
return 503 (wired in SLICE-06).
---ci---
project: praxis
phase: 1
milestone: v0.4
status: execute
persona: backend-engineer
task: 01-03
requirements:
covered: [REQ-MT-01, REQ-NFR-MT-01]
---/ci---
Praxis CI