v0.8.26

What's Changed

• Migrate to MCP Python SDK v2 with dual-era protocol support (#89)
  • Port low-level Server handlers to v2 on_* constructor API
  • Keep model-visible tool errors via explicit CallToolResult(is_error=True)
  • Serve both 2025-era handshake clients and 2026-07-28 modern clients
  • Preserve mcp.handshake metrics for modern clients (activity-session based)
  • Allow Mcp-Method / Mcp-Name CORS headers (SEP-2243)
  • Fix integration smokes for required variable_id on create_variable (Appwrite SDK ≥18.1)

Full Changelog: v0.8.25...v0.8.26