fix(faza-e): refresh dedup, fetch timeout, error surfacing

4 fixes for the symptoms Marius hit on Faza E pilot — search returning
"Eroare la căutare" after sessions got stale, even after relogin:

1. Refresh deduplication
   Authentik rotates refresh_tokens — exchange-once. Parallel map +
   search + parcela.get all hit jwt callback concurrently, each fires
   its own refresh, the first wins, the rest get invalid_grant and
   poison the JWT with token.error=RefreshAccessTokenError → user
   appears logged out for no good reason. Cache the inflight refresh
   promise in-memory keyed by refresh_token so concurrent callers
   share one Authentik exchange.

2. Fetch timeout in gis-api-client
   AbortSignal.timeout(30s) on every api.gis.ac call. Without it, a
   slow upstream (ANCPI scrape, orchestrator hiccup) hangs the route
   for the full Next.js default → Marius saw 10s gaps with no
   feedback. Throws GisApiError(504, upstream_timeout) instead.

3. Better error surfacing
   /api/gis/* routes return { error, hint: <first 200 chars> } on
   non-GisApiError throws instead of a bare "internal_error". Easier
   to triage from browser DevTools without paging through container
   logs.

4. Remove diagnostic [gis-search] logs
   Diagnostic served its purpose (identified the stale-token cause
   pre-refresh-fix). Now noise; keep only [auth] refresh success/fail
   + per-route internal_error.

Also adds AbortSignal.timeout(8s) on the Authentik refresh fetch
itself to keep the jwt callback bounded.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/api/gis/parcela/[id]/route.ts

@@ -20,8 +20,7 @@ export async function GET(
   }
 
   try {
-    const data = await gisApi.parcela.get(id);
-    return NextResponse.json(data);
+    return NextResponse.json(await gisApi.parcela.get(id));
   } catch (err) {
     if (err instanceof GisApiError) {
       return NextResponse.json(
@@ -29,6 +28,11 @@ export async function GET(
         { status: err.status },
       );
     }
-    return NextResponse.json({ error: "internal_error" }, { status: 500 });
+    const msg = err instanceof Error ? err.message : String(err);
+    console.error("[gis-parcela] internal error:", msg);
+    return NextResponse.json(
+      { error: "internal_error", hint: msg.slice(0, 200) },
+      { status: 500 },
+    );
   }
 }