gitea: full nox module — client, tools and events (ADR 0044/0046)

Git hosting. 15 tools (repos, issues, PRs, labels, api passthrough) moved out
of the shared sdk. Emits repo.created (from a light poll, catching repos born
of git push or the web UI), issue.opened and pull.merged (from the tools at the
moment of the action) — the poll owns repo.created alone so it is never
announced twice. Typechecks; manifest parses.

modules/gitea/index.ts

@@ -0,0 +1,59 @@
+// gitea's events. The tool runtime imports this once the broker is bound. It watches the forge and
+// emits what appeared.
+//
+// Emits (novox/hq ADR 0046/0047):
+//   module.gitea.repo.created   — a repository appeared, however it was made (push, web UI, or tool)
+//
+// issue.opened and pull.merged are emitted from the tools (tools/index.ts), at the instant the mesh
+// takes that action — the natural point, and one process only. repo.created belongs here instead:
+// a repository is usually born from a `git push` or the web UI, which no tool sees, so polling the
+// repo list is the only way to catch every path — and keeping it out of the create-repo tool means
+// the fact is never announced twice from two processes.
+//
+// The polling is deliberately unhurried: an event a minute late is still an event, whereas hammering
+// the forge for an immediacy nobody asked for is not.
+
+import { emit } from "@novox/mesh-sdk/events";
+import { GiteaClient } from "./client.js";
+
+// Without a token there is nothing to watch; log and stay quiet rather than crash the runtime.
+let gitea: GiteaClient | null = null;
+try {
+  gitea = GiteaClient.fromEnv();
+} catch (err) {
+  console.log(`[gitea] not watching — ${err instanceof Error ? err.message : String(err)}`);
+}
+
+// New repositories, by diffing the repo list. Primed silently on the first look, or a restart would
+// re-announce every existing repository as freshly created.
+const seen = new Set<string>();
+let primed = false;
+async function pollRepos(client: GiteaClient): Promise<void> {
+  const repos = await client.listRepos(1, 50);
+  for (const repo of repos) {
+    if (!seen.has(repo.full_name)) {
+      if (primed) {
+        await emit("module.gitea.repo.created", {
+          full_name: repo.full_name,
+          owner: repo.owner,
+          name: repo.name,
+          private: repo.private,
+          html_url: repo.html_url,
+        });
+      }
+      seen.add(repo.full_name);
+    }
+  }
+  primed = true;
+}
+
+if (gitea) {
+  const client = gitea;
+  const tick = (fn: () => Promise<void>, everyMs: number): void => {
+    const run = (): void => void fn().catch((err) => console.error(`[gitea] ${err}`));
+    setInterval(run, everyMs);
+    run();
+  };
+  tick(() => pollRepos(client), 60_000);
+  console.log("[gitea] watching for new repositories");
+}