fix: remove stale knowledge_base_hybrid references, fix generic ENV_PATH

- file_ingestion.py: docstrings now reference 'configured collection'
  instead of hardcoded 'knowledge_base_hybrid' (code already uses
  COLLECTION_NAME env var, defaulting to knowledge_base)
- context_enhancer.py: same docstring fix
- wiki_continuous_ingest.py: ENV_PATH now points to memory-os/docker/.env
  instead of ai-stack/cognitive-agent/.env (production-specific path)

docker/worker/tasks/file_ingestion.py

@@ -1,7 +1,7 @@
 """
 Tasks — File-based wiki ingestion (Phase B: continuous).
 Receives a file path to a .md file inside the container (e.g. /wiki/concepts/new.md),
-extracts frontmatter, generates DENSE + BM25 SPARSE embeddings, upserts into knowledge_base_hybrid.
+extracts frontmatter, generates DENSE + BM25 SPARSE embeddings, upserts into the configured collection.
 """
 import logging
 import os
@@ -152,7 +152,7 @@ async def ingest_file(
     file_path: str,
 ) -> dict:
     """
-    Ingests a .md file from the vault into knowledge_base_hybrid (dense + BM25 sparse).
+    Ingests a .md file from the vault (dense + BM25 sparse).
     Returns a dict with id and status.
     """
     wiki_root = Path(WIKI_PATH).resolve()

scripts/context_enhancer.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 """
-Context Enhancer — HYBRID search (semantic + BM25) on knowledge_base_hybrid
+Context Enhancer — HYBRID search (semantic + BM25) on the configured collection
 for prompt enrichment.
 
 Runs as a synchronous function (fast, <1s) before each Hermes response.

scripts/wiki_continuous_ingest.py

@@ -18,7 +18,7 @@ from arq.connections import RedisSettings
 import redis.asyncio as aioredis
 
 # ─── Config ────────────────────────────────────────────────────────────────
-ENV_PATH = Path.home() / "ai-stack" / "cognitive-agent" / ".env"
+ENV_PATH = Path.home() / "memory-os" / "docker" / ".env"
 if ENV_PATH.exists():
     load_dotenv(ENV_PATH)