style: apply ruff auto-fixes

scripts/check_try_balance.py

@@ -0,0 +1,35 @@
+from pathlib import Path
+p=Path('SYS/pipeline.py')
+s=p.read_text(encoding='utf-8')
+lines=s.splitlines()
+stack=[]
+for i,l in enumerate(lines,1):
+    stripped=l.strip()
+    # Skip commented lines
+    if stripped.startswith('#'):
+        continue
+    # compute indent as leading spaces (tabs are converted)
+    indent = len(l) - len(l.lstrip(' '))
+    if stripped.startswith('try:'):
+        stack.append((indent, i))
+    if stripped.startswith('except ') or stripped=='except:' or stripped.startswith('finally:'):
+        # find the most recent try with same indent
+        for idx in range(len(stack)-1, -1, -1):
+            if stack[idx][0] == indent:
+                stack.pop(idx)
+                break
+        else:
+            # no matching try at same indent
+            print(f"Found {stripped.split()[0]} at line {i} with no matching try at same indent")
+
+print('Unmatched try count', len(stack))
+if stack:
+    print('Unmatched try positions (indent, line):', stack)
+    for indent, lineno in stack:
+        start = max(1, lineno - 10)
+        end = min(len(lines), lineno + 10)
+        print(f"Context around line {lineno}:")
+        for i in range(start, end + 1):
+            print(f"{i:5d}: {lines[i-1]}")
+else:
+    print("All try statements appear matched")