docs: add changelog and expose test-api command in readme

CHANGELOG.md

@@ -0,0 +1,11 @@
+# Changelog
+
+## 0.1.0-mvp
+
+- Added no-reply API service (`/v1/chat/completions`, `/v1/responses`, `/v1/models`)
+- Added optional bearer auth (`AUTH_TOKEN`)
+- Added WhisperGate plugin with deterministic rule gate
+- Added discord-specific 🔚 prompt injection for bypass/end-symbol paths
+- Added containerization (`Dockerfile`, `docker-compose.yml`)
+- Added helper scripts for smoke/dev lifecycle and rule validation
+- Added no-touch config rendering and integration docs

README.md

@@ -21,7 +21,8 @@ The no-reply provider returns `NO_REPLY` for any input.
 - `no-reply-api/` — OpenAI-compatible minimal API that always returns `NO_REPLY`
 - `docs/` — rollout and configuration notes
 - `scripts/` — smoke/dev/helper checks
-- `Makefile` — common dev commands (`make check`, `make check-rules`, `make up`)
+- `Makefile` — common dev commands (`make check`, `make check-rules`, `make test-api`, `make up`)
+- `CHANGELOG.md` — milestone summary
 
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