feat(console): add initial console for Cursor BYOK with provider management and LLM call tracking

cursor-server/migrations/0002_input_anchors.sql

@@ -0,0 +1,9 @@
+CREATE TABLE input_anchors (
+    conversation_id TEXT NOT NULL,
+    input_id TEXT NOT NULL,
+    base_revision_id INTEGER NOT NULL,
+    created_at_ms INTEGER NOT NULL,
+    PRIMARY KEY (conversation_id, input_id),
+    FOREIGN KEY (conversation_id) REFERENCES conversations(conversation_id),
+    FOREIGN KEY (base_revision_id) REFERENCES conversation_revisions(revision_id)
+);