* feat: add PostgreSQL CI integration tests
Add --storage-backend pytest option and shared storage_backend fixture
in conftest.py that creates SQLiteBackend or PostgreSQLBackend based
on the flag. Migrate 13 storage test files to use shared fixture
instead of local SQLiteBackend fixtures.
Add test-postgres CI job with PostgreSQL 17 service container that
runs the full test suite against real PostgreSQL.
* fix: use TRUNCATE CASCADE for PG cleanup, wrap in try/finally
TRUNCATE is faster than per-table DELETE and resets autoincrement
sequences. try/except ensures reset_storage() always runs even if
cleanup fails due to a corrupted connection from a failing test.
* fix: document _engine coupling in PG cleanup comment
* Add channel notification tool with security hardening
Implements the `notify` tool allowing the LLM to send notifications to
Discord channels/users via the channel gateway. Includes fixes for 11
review findings: JWT auth on the gateway endpoint, first-healthy gateway
delivery with retry+backoff, rate limiting only on success, SSRF URL
scheme validation, Discord mention sanitization, SQLite ON CONFLICT
upsert preserving created timestamps, advertise URL resolution for
0.0.0.0 bind, randomized service IDs, generic error messages to prevent
internal state leakage, and partial direct-target validation.
Service registry with heartbeat-based health filtering (migration 005).
Channel gateway registers on startup, heartbeats every 30s, deregisters
on shutdown. 70 new tests covering tool prepare/execute, HTTP endpoint
auth (static + JWT), storage CRUD, and retry behavior.
* Add notify documentation, diagrams, and review fixes
Documentation:
- New sequence diagram 17-notify-flow.puml showing end-to-end delivery
- Updated 16-channel-architecture.puml with services table, notify HTTP
path, and Notification Flow note
- channels.md: Notifications section (targeting, delivery flow, service
registry, security) and new config table entries
- tools.md: notify tool reference, updated counts/tables (14→15 tools)
- security.md: channel gateway row in service-to-service auth table
- architecture.md: notification subsystem paragraph
Review fixes (copilot):
- _http.py: fail closed when auth unconfigured (401 instead of pass-
through), strip whitespace on message/title, generic error messages
for user-not-found vs no-linked-channels
- session.py: parse gateway response JSON and require at least one
result with status=="sent" before counting as success
- _postgresql.py: use index_elements instead of constraint for upsert
Patrick Buckley