Multi Database MCP Server

Implement TimescaleDB compression policy tools (TOOL-4) This commit implements the compression policy tools for TimescaleDB integration: - Added Enable/Disable compression operations - Added Add/Remove compression policy operations - Added Get compression settings operation - Added tests for all compression policy operations - Updated TIMESCALEDB_IMPLEMENTATION.md to reflect completion Compression policies in TimescaleDB allow for automatic compression of older data chunks, which significantly reduces storage requirements while maintaining efficient query performance.