test(server): give the integration suite headroom over CI contention

The dialog-reachability corpus sweep (440 tree-sitter parses) runs ~3.2s locally
but timed out at vitest's 5s default in CI: the External + Integration + Transpile
phase runs the integration, unit, and transpile projects concurrently, so a
CPU-contended runner is far slower than an isolated local run. My pre-merge local
test:all passed it for exactly that reason - no contention.

Raise testTimeout to 30s for the whole server-integration project rather than
patch the one test: every test here sweeps real external corpora, so the class
shares the risk. CI already ran the full suite and only this one test crossed the
line (114/115 passed under the same contention), so 30s - ~9x the local runtime -
is ample, and a genuine hang still fails.

Author: burner1024

server/vitest.integration.config.ts

@@ -21,5 +21,11 @@ export default defineConfig({
         name: "server-integration",
         include: ["test/integration/**/*.test.ts"],
         setupFiles: ["test/integration/setup.ts"],
+        // These tests sweep real external corpora (hundreds of tree-sitter parses), and the
+        // full suite runs them alongside the unit and transpile projects, so a CPU-contended
+        // CI runner is far slower than a local run - the corpus reachability sweep is ~3s
+        // locally but blew past the 5s default under contention. Give the class real headroom;
+        // a genuine hang still fails at 30s.
+        testTimeout: 30_000,
     },
 });