feat: implement GEWU service and local agent workflows

docs/acceptance/search-benchmark-10000.json

@@ -0,0 +1,35 @@
+{
+  "benchmark": "sqlite-search-adapter-synthetic-v1",
+  "environment": {
+    "logical_cpus": 8,
+    "platform": "Linux-7.2.5-3-omarchy-x86_64-with-glibc2.44",
+    "processor": "Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz",
+    "python": "3.14.7",
+    "sqlite": "3.53.4"
+  },
+  "evidence_scope": "synthetic adapter benchmark; excludes HTTP/auth, Git object reads, and semantic relevance",
+  "limitations": [
+    "synthetic records reuse one valid claim/citation shape and are not a relevance corpus",
+    "in-memory canonical reads omit Git filesystem and HTTP/API overhead",
+    "the PRD hardware, cache state, concurrency, and percentile decisions are not fixed"
+  ],
+  "measurements": {
+    "cold_index_rebuild_and_first_search_seconds": 43.55,
+    "first_result_count": 20,
+    "synthetic_seed_seconds": 0.214,
+    "warm_search_ms": {
+      "max": 28.418,
+      "p50": 23.805,
+      "p95": 26.681
+    }
+  },
+  "workload": {
+    "nodes_per_project": 10000,
+    "page_size": 20,
+    "projects": 1,
+    "query": "interactive visitors",
+    "query_project": "bench-project-000",
+    "total_nodes": 10000,
+    "warm_samples": 30
+  }
+}