ci(e2e): screenshot each sign-in step + retry gradle on wrapper flake

Diagnose step proved the user IS recognized by both BAPI and FAPI on the
same instance (sacred-phoenix-9), with password_enabled and
needs_first_factor → password as the expected response. Despite that, the
AuthView pivots to the Sign Up "Email address" screen after Continue, so
this is a client-side state issue, not config.

Add takeScreenshot between each step of the sign-in subflow so the
intermediate AuthView state is captured in artifacts — we'll see exactly
which step transitions to sign-up.

Also wrap expo run:android in a 3-attempt retry. The previous run failed
on a transient TLS reset downloading gradle-8.14.3-bin.zip; a retry on
that single curl avoids burning a 10-min cycle on a network flake.

Author: chriscanin

.github/workflows/mobile-e2e.yml

@@ -287,7 +287,11 @@ jobs:
           script: >-
             cd clerk-expo-quickstart/NativeComponentQuickstart &&
             npx expo prebuild --clean &&
-            npx expo run:android --variant release --no-bundler &&
+            ( ok=0; for i in 1 2 3; do
+                if npx expo run:android --variant release --no-bundler; then ok=1; break; fi;
+                echo "expo run:android attempt $i failed (likely gradle wrapper flake); retrying in 15s";
+                sleep 15;
+              done; [ "$ok" = 1 ] ) &&
             cd ../../integration-mobile &&
             find flows -type f -name "*.yaml" ! -path "*/common/*"
             ${FLOWS_FILTER:+-path "*$FLOWS_FILTER*"} -print0

integration-mobile/flows/common/sign-in-email-password.yaml

@@ -4,15 +4,18 @@ appId: com.clerk.clerkexpoquickstart
 ---
 - assertVisible:
     text: 'Welcome! Sign in to continue\.?'
+- takeScreenshot: debug-01-welcome
 - tapOn:
     text: "Enter your email or username"
 - eraseText: 50
 - inputText: ${CLERK_TEST_EMAIL}
+- takeScreenshot: debug-02-email-typed
 - tapOn:
     text: "Continue"
     index: 0
 - waitForAnimationToEnd:
     timeout: 3000
+- takeScreenshot: debug-03-after-continue
 - tapOn:
     text: "Enter your password"
 - eraseText: 50