Initial import of LogDarioSeq baseline

Establishes version control for the personal Logseq DB fork before
starting the server-client architecture migration and domain features
described in docs/agent-guide and the approved implementation plan.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

deps/db-sync/worker/migrations/0003_add_indexes.sql

@@ -0,0 +1,8 @@
+create index if not exists idx_graph_members_graph_id_created_at
+on graph_members (graph_id, created_at);
+
+create index if not exists idx_graphs_user_id_updated_at
+on graphs (user_id, updated_at desc);
+
+create index if not exists idx_users_email
+on users (email);