fix: deep GPU integration, fix all ruff/mypy issues, add .dockerignore

- Integrate GPU scoring inline into reasoning/multi_path.py (auto-uses GPU when available)
- Integrate GPU deduplication into multi_agent/consensus_engine.py
- Add semantic_search() method to memory/semantic_graph.py with GPU acceleration
- Integrate GPU training into self_improvement/training.py AutoTrainer
- Fix all 758 ruff lint issues (whitespace, import sorting, unused imports, ambiguous vars, undefined names)
- Fix all 40 mypy type errors across the codebase (no-any-return, union-attr, arg-type, etc.)
- Fix deprecated ruff config keys (select/ignore -> [tool.ruff.lint])
- Add .dockerignore to exclude .venv/, tests/, docs/ from Docker builds
- Add type hints and docstrings to verification/outcome.py
- Fix E402 import ordering in witness_agent.py
- Fix F821 undefined names in vector_pgvector.py and native.py
- Fix E741 ambiguous variable names in reflective.py and recommender.py

All 276 tests pass. 0 ruff errors. 0 mypy errors.

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

fusionagi/api/websocket.py

@@ -1,14 +1,12 @@
 """WebSocket streaming for Dvādaśa responses."""
 
 import asyncio
-import json
 from concurrent.futures import ThreadPoolExecutor
 from typing import Any
 
-from fusionagi.api.dependencies import get_orchestrator, get_session_store, get_event_bus
+from fusionagi.api.dependencies import get_event_bus, get_orchestrator, get_session_store
 from fusionagi.core import run_heads_parallel, run_witness, select_heads_for_complexity
 from fusionagi.schemas.commands import parse_user_input
-from fusionagi.schemas.head import HeadId, HeadOutput
 
 
 async def handle_stream(
@@ -24,7 +22,7 @@ async def handle_stream(
     ensure_initialized()
     store = get_session_store()
     orch = get_orchestrator()
-    bus = get_event_bus()
+    get_event_bus()
     if not store or not orch:
         await send_fn({"type": "error", "message": "Service not initialized"})
         return