Stage 6: learn_call_flow rebuilt on the learner, docs truth sweep

The call-flow learner finally gets fed: exploration mode records its
IVR discoveries on the call (ActiveCall.exploration_steps) instead of
throwing them away, persistence stores them in the call record's
metadata, and the rebuilt learn_call_flow MCP tool turns a completed
exploration call into a stored flow via CallFlowLearner — correct
constructor (llm_client from get_llm, heuristic labels when the LLM
is unavailable), build for a new number, merge/refine when a flow
already exists. save_learned_flow/update_flow_from_model keep the
CallFlow↔row mapping in call_persistence.

Test gaps closed: tests/test_learner.py (discoveries→linked steps,
exploration persistence, learn-then-refine through the in-memory MCP
client, no-data and unknown-call answers) and tests/test_websocket.py
(4401 without token, trunk-status-then-replay on connect, per-call
stream filtering).

Docs aligned to code: README (15 tools incl. learn_call_flow, HTTP
not SSE, Python 3.12+, PostgreSQL+Alembic — no SQLite fallback, media
pipeline marked stub-mode until pjsua2 installed, Alembic and honest
/health checked off); docs/mcp-server.md rewritten against the actual
tool surface (hangup not end_call, real params, 3 real resources,
/mcp/ streamable HTTP + bearer auth); architecture/development/
configuration drift fixed.

pyproject: pruned never-imported deps (websockets, librosa,
soundfile, python-multipart).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

pyproject.toml

@@ -13,34 +13,30 @@ dependencies = [
     # Web framework
     "fastapi>=0.115.0",
     "uvicorn[standard]>=0.32.0",
-    "websockets>=13.0",
-    
+
     # Database
     "sqlalchemy[asyncio]>=2.0.36",
     "asyncpg>=0.30.0",
     "alembic>=1.14.0",
-    
+
     # Settings & validation
     "pydantic>=2.10.0",
     "pydantic-settings>=2.6.0",
-    
+
     # SIP signaling
     "sippy>=1.2.0",
-    
+
     # Audio analysis
     "numpy>=1.26.0",
-    "librosa>=0.10.0",
-    "soundfile>=0.12.0",
-    
+
     # HTTP client (for Speaches STT)
     "httpx>=0.28.0",
-    
+
     # MCP server (3.x — http_app + StaticTokenVerifier)
     "fastmcp>=3.0.0",
-    
+
     # Utilities
     "python-slugify>=8.0.0",
-    "python-multipart>=0.0.12",
 ]
 
 [project.optional-dependencies]