refactor(api): limit project mirror to Target Date only

apps/api/src/index.ts

@@ -30,22 +30,16 @@ import { buildStats } from "./stats.ts";
 
 // ── shared side effects after a state write ──────────────────────
 
-/** Project-field half of a mirror; shared by every write path. */
-async function mirrorFields(mirror: Mirror, outcome: LogOutcome): Promise<void> {
-  await mirror.setStage(outcome.issue, outcome.stage);
-  await mirror.setTargetDate(outcome.issue, outcome.next_review);
-  if (outcome.first) await mirror.setFirstAttempt(outcome.issue, outcome.result);
-}
-
 /**
- * Mirror one logged attempt into GitHub: Project fields always; on a
+ * Mirror one logged attempt into GitHub: the Project's Target Date always; on a
  * first-ever pass also close the problem's sub-issue (comment first — repo
  * convention). Runs inside ctx.waitUntil; failures are warnings.
  */
 async function mirrorOutcome(env: Env, outcome: LogOutcome, source: string): Promise<void> {
   if (outcome.error || outcome.duplicate) return;
   const gh = github(env.GH_PAT, env.REPO);
-  await mirrorFields(projectMirror(gh, env.REPO.split("/")[0]!), outcome);
+  const mirror = projectMirror(gh, env.REPO.split("/")[0]!);
+  await mirror.setTargetDate(outcome.issue, outcome.next_review);
   if (outcome.first && outcome.result === "pass") {
     try {
       await gh.closeIssue(
@@ -248,7 +242,7 @@ async function handleSolved(request: Request, env: Env, date: string): Promise<R
       logged.push(outcomeLine(outcome));
       // One mirror for the batch: field IDs resolve once, not per problem.
       mirror ??= projectMirror(github(env.GH_PAT, env.REPO), env.REPO.split("/")[0]!);
-      await mirrorFields(mirror, outcome);
+      await mirror.setTargetDate(outcome.issue, outcome.next_review);
     }
   }
   return Response.json({ date, logged, skipped, warnings: mirror?.warnings ?? [] });