🔨 ruff: enable BLE catch-all rule (#165)

Adds flake8-blind-except (BLE) to ruff's selected rules so bare `except:`,
`except Exception:`, and `except BaseException:` are flagged. Forces a
deliberate choice on error handling - either narrow the exception or add
`# noqa: BLE001` with a justification.

Annotates the two existing legitimate broad catches (test thread error
collection, observability fallback) with reason comments.

https://claude.ai/code/session_01LKvQDaUrRDui7ZQRkHH4Cp

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

Author: Miyamura80

pyproject.toml

@@ -55,7 +55,7 @@ line-length = 88
 target-version = "py312"
 
 [tool.ruff.lint]
-select = ["E", "F", "W", "I", "N", "UP", "B", "C4", "SIM", "C901", "FIX"]
+select = ["E", "F", "W", "I", "N", "UP", "B", "C4", "SIM", "C901", "FIX", "BLE"]
 ignore = ["E501", "UP015", "B008"]
 
 [tool.ruff.lint.mccabe]

tests/test_logging_thread_safety.py

@@ -30,7 +30,7 @@ def call_setup():
             try:
                 barrier.wait(timeout=5)
                 logging_module.setup_logging()
-            except Exception as e:
+            except Exception as e:  # noqa: BLE001 - test collects any thread failure
                 errors.append(e)
 
         threads = [threading.Thread(target=call_setup) for _ in range(10)]

utils/llm/dspy_langfuse.py

@@ -102,7 +102,7 @@ def on_module_end(  # noqa
                 outputs_extracted = dict(outputs.items())
             except AttributeError:
                 outputs_extracted = {"value": outputs}
-            except Exception as e:
+            except Exception as e:  # noqa: BLE001 - observability fallback must never raise
                 outputs_extracted = {"error_extracting_module_output": str(e)}
         get_client().update_current_span(
             input=self.input_field_values.get(None) or {},