Wait for emulator readiness log instead of TCP port check

Docker's port proxy accepts TCP on 5672 before the Service Bus emulator app
binds (while SQL Edge is still initialising), so the previous TCP check
passed prematurely and tests hit a not-yet-ready emulator (AMQP
ConnectionRefused). Wait for the emulator's "Successfully Up" log line.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: NinjaRocks

.github/workflows/Azure-Build.yml

@@ -67,21 +67,26 @@ jobs:
 
       - name: Start Azure Service Bus emulator
         working-directory: .github/azure-emulator
-        run: docker compose up -d --wait
+        run: docker compose up -d
 
-      - name: Wait for emulator AMQP port
+      # A TCP check on 5672 is unreliable: Docker's port proxy accepts the
+      # connection before the emulator app binds (and while SQL Edge is still
+      # initialising). Wait for the emulator's readiness log line instead.
+      - name: Wait for emulator to be ready
+        working-directory: .github/azure-emulator
         run: |
-          echo "Waiting for Service Bus emulator on localhost:5672..."
-          for i in $(seq 1 30); do
-            if (echo > /dev/tcp/localhost/5672) >/dev/null 2>&1; then
-              echo "Emulator is accepting connections."
+          echo "Waiting for the Service Bus emulator to report ready..."
+          for i in $(seq 1 60); do
+            if docker compose logs sb-emulator 2>&1 | grep -qi "Emulator Service is Successfully Up"; then
+              echo "Emulator is ready."
+              sleep 5   # small settle margin
               exit 0
             fi
-            echo "Attempt $i/30 - not ready yet, waiting..."
-            sleep 3
+            echo "Attempt $i/60 - emulator not ready yet, waiting..."
+            sleep 5
           done
-          echo "ERROR: emulator did not become ready"
-          docker compose -f .github/azure-emulator/docker-compose.yml logs
+          echo "ERROR: emulator did not become ready in time"
+          docker compose logs
           exit 1
 
       - name: Restore & build