Implement efficient sync for Todoist and Trello APIs

- Add Todoist Sync API v9 support with incremental sync tokens
- Store sync tokens in SQLite for persistence across restarts
- Add field filtering to Trello API calls to reduce payload size
- Update handlers to use incremental sync (merge changes vs full replace)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/migrations/003_add_sync_tokens.sql b/migrations/003_add_sync_tokens.sql
new file mode 100644
index 0000000..dd29576
--- /dev/null
+++ b/migrations/003_add_sync_tokens.sql
@@ -0,0 +1,6 @@
+-- Sync tokens table for incremental API sync
+CREATE TABLE IF NOT EXISTS sync_tokens (
+    service TEXT PRIMARY KEY,
+    token TEXT NOT NULL,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);