Route a recheck's pending through the gitea module's one writer of mesh/merge-gate

The recheck's pending was written from the tools' bundle, its own process, past the
writer's per-head chain: the first run's verdict mark stayed set, so a rechecked head
never said where its new run builds, and an old run's verdict in flight or redelivered
could land over the pending. The status tool is now served from the watcher's bundle
and writes the merge check's pending through the writer, and a verdict whose ask
(checked.id) predates the check now pending is dropped, weighed after a restart against
the forge's own history of the gate (novox/hq issue 456).

modules/gitea/test/guard.test.ts

@@ -11,6 +11,8 @@ import { createServer, type IncomingMessage, type ServerResponse } from "node:ht
 import { GiteaClient } from "../dist/client.js";
 import { ConfiguredToken } from "../dist/token.js";
 import { getGiteaTools } from "../dist/tools/index.js";
+import { commitStatusTool } from "../dist/delivery.js";
+import { GateWriter } from "../dist/gate.js";
 import { judgeApiCall, judgeProtectionChange, ruleCovers, routedPath } from "../dist/guard.js";
 
 interface Sent { method: string; path: string; body: any }
@@ -97,7 +99,13 @@ const server = createServer(async (req, res) => {
 await new Promise<void>((r) => server.listen(0, "127.0.0.1", () => r()));
 after(() => new Promise<void>((r) => server.close(() => r())));
 const { port } = server.address() as { port: number };
-const tools = getGiteaTools(new GiteaClient(`http://127.0.0.1:${port}`, new ConfiguredToken("t")));
+const client = new GiteaClient(`http://127.0.0.1:${port}`, new ConfiguredToken("t"));
+// gitea_commit_status is served from the watcher's bundle, beside the merge check's one writer (novox/hq issue 456).
+const tools = [...getGiteaTools(client), commitStatusTool({
+  setCommitStatus: (o, r, sha, s) => client.setCommitStatus(o, r, sha, s),
+  gates: new GateWriter({ setCommitStatus: (o, r, sha, s) => client.setCommitStatus(o, r, sha, s),
+    gateOf: async () => undefined, gateHistory: async () => [] }),
+})];
 const tool = (name: string) => tools.find((t) => t.name === name)!;
 const writes = () => state.sent.map((s) => `${s.method} ${s.path}`);