Fix non-unique request IDs when x-request-id header is absent in french-feedback

[Copilot]

When x-request-id is missing, all requests fell back to the literal "no-id", making them indistinguishable in logs and traces.

Changes

• supabase/functions/french-feedback/index.ts
  • Replace "no-id" fallback with crypto.randomUUID() so every request is uniquely identifiable
  • Hoist requestId declaration above the try block so it's also available in the catch handler
  • Fix hardcoded [no-id] string in catch-block console.error to use the requestId variable

// Before
try {
  const requestId = req.headers.get("x-request-id") ?? "no-id";
  ...
} catch (error) {
  console.error(`[no-id] Error in french-feedback function:`, error);
}

// After
const requestId = req.headers.get("x-request-id") ?? crypto.randomUUID();
try {
  ...
} catch (error) {
  console.error(`[${requestId}] Error in french-feedback function:`, error);
}

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