Improve CI workflow wait logic and reduce duplication (#6496)

* Improve Supervisor startup wait logic in CI workflow

The 'Wait for Supervisor to come up' step was failing intermittently when
the Supervisor API wasn't immediately available. The original script relied
on bash's lenient error handling in command substitution, which could fail
unpredictably.

Changes:
- Use curl -f flag to properly handle HTTP errors
- Use jq -e for robust JSON validation and exit code handling
- Add explicit 5-minute timeout with elapsed time tracking
- Reduce log noise by only reporting progress every 15 seconds
- Add comprehensive error diagnostics on timeout:
  * Show last API response received
  * Dump last 50 lines of Supervisor logs
- Show startup time on success for performance monitoring

This makes the CI workflow more reliable and easier to debug when the
Supervisor fails to start.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* Use YAML anchor to deduplicate wait step in CI workflow

The 'Wait for Supervisor to come up' step appears twice in the
run_supervisor job - once after starting and once after restarting.
Use a YAML anchor to define the step once and reference it on the
second occurrence.

This reduces duplication by 28 lines and makes future maintenance
easier by ensuring both wait steps remain identical.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

.github/workflows/builder.yml

@@ -290,15 +290,36 @@ jobs:
       - name: Start the Supervisor
         run: docker start hassio_supervisor
 
-      - name: Wait for Supervisor to come up
+      - &wait_for_supervisor
+        name: Wait for Supervisor to come up
         run: |
           SUPERVISOR=$(docker inspect --format='{{.NetworkSettings.IPAddress}}' hassio_supervisor)
-          ping="error"
-          while [ "$ping" != "ok" ]; do
-            ping=$(curl -sSL "http://$SUPERVISOR/supervisor/ping" | jq -r '.result')
+          echo "Waiting for Supervisor API at http://${SUPERVISOR}/supervisor/ping"
+          timeout=300
+          elapsed=0
+
+          while [ $elapsed -lt $timeout ]; do
+            if response=$(curl -sSf "http://${SUPERVISOR}/supervisor/ping" 2>/dev/null); then
+              if echo "$response" | jq -e '.result == "ok"' >/dev/null 2>&1; then
+                echo "Supervisor is up! (took ${elapsed}s)"
+                exit 0
+              fi
+            fi
+
+            if [ $((elapsed % 15)) -eq 0 ]; then
+              echo "Still waiting... (${elapsed}s/${timeout}s)"
+            fi
+
             sleep 5
+            elapsed=$((elapsed + 5))
           done
 
+          echo "ERROR: Supervisor failed to start within ${timeout}s"
+          echo "Last response: $response"
+          echo "Checking supervisor logs..."
+          docker logs --tail 50 hassio_supervisor
+          exit 1
+
       - name: Check the Supervisor
         run: |
           echo "Checking supervisor info"
@@ -362,14 +383,7 @@ jobs:
             exit 1
           fi
 
-      - name: Wait for Supervisor to come up
-        run: |
-          SUPERVISOR=$(docker inspect --format='{{.NetworkSettings.IPAddress}}' hassio_supervisor)
-          ping="error"
-          while [ "$ping" != "ok" ]; do
-            ping=$(curl -sSL "http://$SUPERVISOR/supervisor/ping" | jq -r '.result')
-            sleep 5
-          done
+      - *wait_for_supervisor
 
       - name: Restore SSH add-on from backup
         run: |