Refactor summary and context handling in hooks

- Updated `summary-hook.js` to improve logging and session handling.
- Modified `context.ts` to fetch recent sessions with status and summary info, enhancing output formatting.
- Added new methods in `HooksDatabase.ts` for retrieving recent sessions and their summaries.
- Improved observation retrieval logic in `context.ts` to display relevant information for active sessions.
- Enhanced prompt documentation in `prompts.ts` to clarify output expectations.
- Refactored logger methods in `logger.ts` to instance methods for better encapsulation.

src/sdk/prompts.ts

@@ -45,6 +45,7 @@ Skip routine operations:
 - Package installations with no errors
 - Simple file listings
 - Repetitive operations you've already documented
+- **No output necessary if skipping.**
 
 OUTPUT FORMAT
 -------------