fix(cliproxy): preserve entitlement evidence on agy failures

src/cliproxy/quota-fetcher.ts

@@ -352,6 +352,28 @@ function buildAntigravityFailure(
   };
 }
 
+function mergeAntigravityTierEvidence(
+  entitlement: ProviderEntitlementEvidence | undefined,
+  tier: AccountTier,
+  rawTierId: string | null,
+  rawTierLabel: string | null
+): ProviderEntitlementEvidence | undefined {
+  if (tier === 'unknown' && !entitlement) {
+    return undefined;
+  }
+
+  return buildProviderEntitlementEvidence({
+    normalizedTier: tier,
+    rawTierId,
+    rawTierLabel,
+    source: rawTierId ? 'runtime_api' : (entitlement?.source ?? 'runtime_inference'),
+    confidence: rawTierId ? 'high' : (entitlement?.confidence ?? 'medium'),
+    accessState: entitlement?.accessState ?? 'unknown',
+    capacityState: entitlement?.capacityState ?? 'unknown',
+    notes: entitlement?.notes ?? null,
+  });
+}
+
 async function readManagedResponse(
   response: Response,
   viaManagement: boolean
@@ -620,6 +642,14 @@ async function getProjectId(accountId: string, accessToken: string): Promise<Pro
       error: 'Invalid quota response from provider',
       errorCode: 'provider_unavailable',
       retryable: true,
+      entitlement: buildProviderEntitlementEvidence({
+        normalizedTier: 'unknown',
+        source: 'runtime_inference',
+        confidence: 'low',
+        accessState: 'unknown',
+        capacityState: 'temporarily_unavailable',
+        notes: 'Provider returned a 2xx response with an empty or invalid project payload.',
+      }),
     };
   }
 
@@ -862,6 +892,12 @@ export async function fetchAccountQuota(
   } else {
     result.isExpired = authData.isExpired;
     result.expiresAt = authData.expiresAt || undefined;
+    result.entitlement = mergeAntigravityTierEvidence(
+      result.entitlement,
+      apiTier,
+      rawTierId,
+      rawTierLabel
+    );
   }
 
   if (verbose && result.error) {