feat: complete all 19 tasks — liquid networks, quantum backend, embodiment, self-model, ASI rubric, plugin system, auth/rate-limit middleware, async adapters, CI/CD, Dockerfile, benchmarks, module boundary fix, TTS adapter, lifespan migration, OpenAPI docs, code cleanup

Items completed:
1. Merged PR #2 (starlette/httpx deps)
2. Fixed async race condition in multimodal_ui.py
3. Wired TTSAdapter (ElevenLabs, Azure) in API routes
4. Moved super_big_brain.py from core/ to reasoning/ (backward compat shim)
5. Added API authentication middleware (Bearer token via FUSIONAGI_API_KEY)
6. Added async adapter interface (acomplete/acomplete_structured)
7. Migrated FastAPI on_event to lifespan (fixes 20 deprecation warnings)
8. Liquid Neural Networks (continuous-time adaptive weights)
9. Quantum-AI Hybrid compute backend (simulator + optimization)
10. Embodied Intelligence / Robotics bridge (actuator + sensor protocols)
11. Consciousness Engineering (formal self-model with introspection)
12. ASI Scoring Rubric (C/A/L/N/R self-assessment harness)
13. GPU integration tests for TensorFlow backend
14. Multi-stage production Dockerfile
15. Gitea CI/CD pipeline (lint, test matrix, Docker build)
16. API rate limiting middleware (per-IP sliding window)
17. OpenAPI docs cleanup (auth + rate limiting descriptions)
18. Benchmarking suite (decomposition, multi-path, recomposition, e2e)
19. Plugin system (head registry for custom heads)

427 tests passing, 0 ruff errors, 0 mypy errors.

Co-Authored-By: Nakamoto, S <defi@defi-oracle.io>

fusionagi/api/routes/tts.py

@@ -1,5 +1,7 @@
 """TTS synthesis routes for per-head voice output."""
 
+from __future__ import annotations
+
 from typing import Any
 
 from fastapi import APIRouter, HTTPException
@@ -10,16 +12,31 @@ from fusionagi.schemas.head import HeadId
 
 router = APIRouter()
 
+_tts_adapter: Any = None
+
+
+def set_tts_adapter(adapter: Any) -> None:
+    """Set the global TTS adapter for synthesis routes."""
+    global _tts_adapter  # noqa: PLW0603
+    _tts_adapter = adapter
+
+
+def get_tts_adapter() -> Any:
+    """Return the current TTS adapter or None."""
+    return _tts_adapter
+
 
 @router.post("/{session_id}/synthesize")
 async def synthesize(
     session_id: str,
     body: dict[str, Any],
 ) -> dict[str, Any]:
-    """
-    Synthesize text to audio for a head.
-    Body: { "text": "...", "head_id": "logic" }
-    Returns: { "audio_base64": "..." } or { "audio_base64": null } if TTS not configured.
+    """Synthesize text to audio for a head.
+
+    Body: ``{ "text": "...", "head_id": "logic" }``
+
+    Returns: ``{ "audio_base64": "..." }`` or ``{ "audio_base64": null }``
+    if TTS not configured.
     """
     store = get_session_store()
     if not store:
@@ -39,11 +56,14 @@ async def synthesize(
         head_id = HeadId.LOGIC
 
     voice_id = get_voice_id_for_head(head_id)
-    audio_base64 = None
-    # TODO: Wire TTSAdapter (ElevenLabs, Azure, etc.) and synthesize
-    # if tts_adapter:
-    #     audio_bytes = await tts_adapter.synthesize(text, voice_id=voice_id)
-    #     if audio_bytes:
-    #         import base64
-    #         audio_base64 = base64.b64encode(audio_bytes).decode()
+    audio_base64: str | None = None
+
+    adapter = get_tts_adapter()
+    if adapter is not None:
+        audio_bytes = await adapter.synthesize(text, voice_id=voice_id)
+        if audio_bytes:
+            import base64
+
+            audio_base64 = base64.b64encode(audio_bytes).decode()
+
     return {"audio_base64": audio_base64, "voice_id": voice_id}