ci: Fix YAML syntax error in debug-tmt.yml

Move Python verification code to separate script file to avoid
YAML syntax issues with multiline strings and quotes.

Assisted-by: Claude Code (Sonnet 4.5)

Author: cgwalters

.github/scripts/verify-tmt-patch.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+"""Verify that TMT has the DebugLevelFilter patch applied."""
+
+import sys
+sys.path.insert(0, "/home/runner/.local/lib/python3.13/site-packages")
+
+import tmt.log
+import inspect
+
+# Check if the patch is applied by looking at DebugLevelFilter
+source = inspect.getsource(tmt.log.DebugLevelFilter.filter)
+if "return False" in source and "Filter out DEBUG messages" in source:
+    print("✓ PATCH CONFIRMED: DebugLevelFilter has the fix applied")
+    sys.exit(0)
+else:
+    print("✗ WARNING: Patch may not be applied correctly")
+    print("Source code:")
+    print(source)
+    sys.exit(1)

.github/workflows/debug-tmt.yml

@@ -40,21 +40,7 @@ jobs:
           tmt --version
 
           echo "=== Verify we have the patched version ==="
-          python3 << 'EOF'
-import sys
-sys.path.insert(0, '/home/runner/.local/lib/python3.13/site-packages')
-import tmt.log
-import inspect
-
-# Check if the patch is applied by looking at DebugLevelFilter
-source = inspect.getsource(tmt.log.DebugLevelFilter.filter)
-if 'return False' in source and 'Filter out DEBUG messages' in source:
-    print("✓ PATCH CONFIRMED: DebugLevelFilter has the fix applied")
-else:
-    print("✗ WARNING: Patch may not be applied correctly")
-    print("Source code:")
-    print(source)
-EOF
+          python3 .github/scripts/verify-tmt-patch.py
 
           echo ""
           echo "=== Critical: Check RUNNER_DEBUG, ENABLE_RUNNER_TRACING, and CI ==="