feat(docs): Update documentation and configuration for Neo4j memory settings

- Enhanced `.env.example` and `docker-compose.yml` to include memory configuration options for Neo4j, allowing users to specify heap and page cache sizes for improved performance with large datasets.
- Updated `README.md` to reflect these changes and provide clearer instructions for setting up the environment.
- Improved the `docs_autopilot_enhanced.py` script to gather comprehensive context for documentation generation, ensuring accurate and up-to-date information is included.

These updates enhance the usability and performance of the TriBridRAG system, particularly for users working with large corpora.

Author: DMontgomery40

.env.example

@@ -24,6 +24,12 @@ NEO4J_URI=bolt://localhost:7687
 NEO4J_USER=neo4j
 NEO4J_PASSWORD=password
 
+# Neo4j container memory (for large corpora / graph indexing).
+# These are applied by docker-compose.yml.
+# NEO4J_HEAP_INIT=2G
+# NEO4J_HEAP_MAX=4G
+# NEO4J_PAGECACHE=2G
+
 # ===== Embedding Configuration =====
 EMBEDDING_PROVIDER=openai  # openai, voyage, local
 EMBEDDING_MODEL=text-embedding-3-small