feat(provider): SQLite affect store + ASGI wiring — #195 parity green

The first slice of ratatoskr-as-Tier-3-Bifrost-consumer: a SQLite-backed,
conduit-opaque affect store Worldtree emits Tier-3 persona/affect snapshots
into, plus the thin build_affect_provider_app wiring. The bifrost library
owns the wire; this owns only the store + glue.

- ratatoskr.provider.affect_store: open_affect_store / emit / get /
  build_affect_provider_app. Two-table SQLite schema (snapshots + idempotency).
- Conduit-opaque (INV-001): reads only the two addressing keys; whole-blob
  hash only. LWW-by-arrival across distinct keys; replay-or-conflict
  idempotency (actor-scoped from ctx), raising bifrost's typed exceptions.
- Conformance: #195 parity vs InMemoryAffectStore through the real
  dispatch_affect_call engine. 17 provider tests; 395 full suite.
- Contract v1.1: idempotency model corrected to bifrost's actual semantics
  (caught by real-lib TDD; the artifact-only review structurally could not).
  Heid-panel reviewed (contract + code); idempotency-cache TTL pruning,
  memory.* plane, and the combined two-plane server deferred (see Out of scope).

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "ratatoskr"
-version = "0.17.0"
+version = "0.17.1"
 description = "Worldtree Conversation API debug TUI — multi-pane observability dashboard"
 readme = "README.md"
 requires-python = ">=3.12"