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/memory/vector_pgvector.py

@@ -15,14 +15,14 @@ def create_vector_memory_pgvector(
     Returns None if pgvector/database unavailable.
     """
     try:
-        import pgvector
-        from pgvector.psycopg import register_vector
+        import pgvector  # noqa: F401
+        from pgvector.psycopg import register_vector  # noqa: F401
     except ImportError:
         logger.debug("pgvector not installed; use pip install fusionagi[vector]")
         return None
 
     try:
-        import psycopg
+        import psycopg  # noqa: F401
     except ImportError:
         logger.debug("psycopg not installed; use pip install fusionagi[memory]")
         return None
@@ -39,7 +39,7 @@ class VectorMemoryPgvector:
         table_name: str = "embeddings",
         dimension: int = 1536,
     ) -> None:
-        import pgvector
+        import psycopg
         from pgvector.psycopg import register_vector
 
         self._conn_str = connection_string
@@ -64,6 +64,7 @@ class VectorMemoryPgvector:
 
     def add(self, id: str, embedding: list[float], metadata: dict[str, Any] | None = None) -> None:
         import json
+
         import psycopg
         from pgvector.psycopg import register_vector
 
@@ -82,6 +83,7 @@ class VectorMemoryPgvector:
 
     def search(self, query_embedding: list[float], top_k: int = 10) -> list[dict[str, Any]]:
         import json
+
         import psycopg
         from pgvector.psycopg import register_vector