Support batch task operations in KiteTasks MCP

Creating hundreds of tasks currently requires one MCP call per task, making subscription imports slow.

Please add batch create, update, move, and delete operations with:

• Per-item results containing task IDs and errors.

• Idempotency keys for safe retries after partial failures.

• Parent references within a batch for creating reports and subtasks together.

• Explicit ordering and documented batch-size limits.

This would reduce round trips while preserving reliable recovery and verification.