feat: serve run and log search from any instance, not just the indexer

Adds concurrency_locks.owner_addr, where the indexer advertises a base URL
other instances can reach it on, so searching no longer requires the ingress
to pin /api/srch/* to the indexer pod (WIN-1968).

Bumps the EE ref for windmill-ee-private#feat-indexer-search-proxy.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V2vNYVA1Jc9rrfqCPN6eKg

backend/.sqlx/query-15b0f7ca74a6f769ff7281651b5b062ea40a286151810c3e89d931f352daaf95.json

@@ -0,0 +1,16 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "INSERT INTO concurrency_locks (id, last_locked_at, owner, owner_addr)\n                    VALUES ($1, now(), $2, $3)\n                    ON CONFLICT (id)\n                    DO UPDATE SET\n                        last_locked_at = now(),\n                        owner = EXCLUDED.owner,\n                        owner_addr = EXCLUDED.owner_addr",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Left": [
+        "Varchar",
+        "Varchar",
+        "Varchar"
+      ]
+    },
+    "nullable": []
+  },
+  "hash": "15b0f7ca74a6f769ff7281651b5b062ea40a286151810c3e89d931f352daaf95"
+}

backend/.sqlx/query-1ff3d43899a63d5f56450d8edfc741e2a4823ac287cb94b17c42277c67513b53.json

@@ -0,0 +1,28 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "SELECT last_locked_at, owner_addr FROM concurrency_locks WHERE id = $1",
+  "describe": {
+    "columns": [
+      {
+        "ordinal": 0,
+        "name": "last_locked_at",
+        "type_info": "Timestamp"
+      },
+      {
+        "ordinal": 1,
+        "name": "owner_addr",
+        "type_info": "Varchar"
+      }
+    ],
+    "parameters": {
+      "Left": [
+        "Text"
+      ]
+    },
+    "nullable": [
+      false,
+      true
+    ]
+  },
+  "hash": "1ff3d43899a63d5f56450d8edfc741e2a4823ac287cb94b17c42277c67513b53"
+}

backend/.sqlx/query-a500d9496c643c0107a77e9debc8eae8db9cc8b5de08003b469f1fae72398921.json

@@ -0,0 +1,16 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "UPDATE concurrency_locks SET\n            last_locked_at = now(),\n            owner_addr = $3\n            WHERE id = $1 AND owner = $2",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Left": [
+        "Text",
+        "Text",
+        "Varchar"
+      ]
+    },
+    "nullable": []
+  },
+  "hash": "a500d9496c643c0107a77e9debc8eae8db9cc8b5de08003b469f1fae72398921"
+}

backend/ee-repo-ref.txt

@@ -1 +1 @@
-d6aef91c0f7ba556befbf4addeb7674d4a9dd819
+8943367fd141b96fe86a2632f2f94885140ae345

backend/migrations/20260826214734_indexer_lock_owner_addr.down.sql

@@ -0,0 +1 @@
+ALTER TABLE concurrency_locks DROP COLUMN IF EXISTS owner_addr;

backend/migrations/20260826214734_indexer_lock_owner_addr.up.sql

@@ -0,0 +1,4 @@
+-- The indexer records the base URL other instances can reach it on, so a server
+-- instance without an in-memory index reader can forward search requests to it
+-- instead of requiring the ingress to pin /api/srch/* to the indexer pod.
+ALTER TABLE concurrency_locks ADD COLUMN IF NOT EXISTS owner_addr VARCHAR;