chore(db): drop redundant idx_webhook_on_workflow_id_block_id index (#4809)

Removed because (workflow_id, block_id) is a left-prefix of idx_webhook_on_workflow_id_block_id_updated_at_desc, which fully covers it. The dropped index was non-unique and enforced no constraint.

packages/db/migrations/0221_secret_hannibal_king.sql

@@ -0,0 +1 @@
+DROP INDEX "idx_webhook_on_workflow_id_block_id";

packages/db/migrations/meta/_journal.json

@@ -1541,6 +1541,13 @@
       "when": 1780081787541,
       "tag": "0220_early_hellion",
       "breakpoints": true
+    },
+    {
+      "idx": 221,
+      "version": "7",
+      "when": 1780111474238,
+      "tag": "0221_secret_hannibal_king",
+      "breakpoints": true
     }
   ]
 }

packages/db/schema.ts

@@ -747,11 +747,6 @@ export const webhook = pgTable(
       pathIdx: uniqueIndex('path_deployment_unique')
         .on(table.path, table.deploymentVersionId)
         .where(sql`${table.archivedAt} IS NULL`),
-      // Optimize queries for webhooks by workflow and block
-      workflowBlockIdx: index('idx_webhook_on_workflow_id_block_id').on(
-        table.workflowId,
-        table.blockId
-      ),
       workflowDeploymentIdx: index('webhook_workflow_deployment_idx').on(
         table.workflowId,
         table.deploymentVersionId