Update docs formatting and remove sections

- Remove Multi-Environment and High-Availability factory examples from vector-store-advanced.md
- Update migration example to show Pinecone to Redis instead of reverse
- Remove Best Practices section from contextual-grounding.md
- Fix markdown formatting issues with bullet points in contextual-grounding.md

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: abrookins

docs/contextual-grounding.md

@@ -7,6 +7,7 @@ Contextual grounding is an advanced feature that ensures extracted memories cont
 When AI agents extract memories from conversations, they often contain ambiguous references that lose meaning when viewed outside the original context. Contextual grounding solves this by automatically resolving these references using the complete conversation history.
 
 **Problem Example:**
+
 ```
 Original conversation:
 User: "I met John at the coffee shop yesterday"
@@ -18,6 +19,7 @@ With grounding: "John was really helpful with the project"
 ```
 
 **Key Benefits:**
+
 - **Clear memories**: No ambiguous pronouns or references
 - **Standalone context**: Memories make sense without conversation history
 - **Better search**: More precise matching with complete information