fix: show provider name and dash protocol in model-sync logs

Provider field shows connection name (e.g. "BltCy API"),
Protocol (sourceFormat) shows "-" since model-sync is not
a chat/completion request.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app/api/providers/[id]/sync-models/route.ts

@@ -55,7 +55,8 @@ export async function POST(request: Request, { params }: { params: Promise<{ id:
         path: `/api/providers/${id}/models`,
         status: modelsRes.status,
         model: "model-sync",
-        provider: "-",
+        provider: providerLabel,
+        sourceFormat: "-",
         connectionId: id,
         duration,
         error: modelsData.error || `HTTP ${modelsRes.status}`,
@@ -87,7 +88,8 @@ export async function POST(request: Request, { params }: { params: Promise<{ id:
       path: `/api/providers/${id}/models`,
       status: 200,
       model: "model-sync",
-      provider: "-",
+      provider: providerLabel,
+      sourceFormat: "-",
       connectionId: id,
       duration: Date.now() - start,
       requestType: "model-sync",
@@ -111,6 +113,7 @@ export async function POST(request: Request, { params }: { params: Promise<{ id:
       status: 500,
       model: "model-sync",
       provider: "unknown",
+      sourceFormat: "-",
       connectionId: id,
       duration: Date.now() - start,
       error: error.message || "Sync failed",