[PR] Redact bytes and bytearrays written through RedactedIO [airflow]

["muditagrawal2007 (via GitHub)" <gi...@apache.org>]

muditagrawal2007 opened a new pull request, #75129:
URL: https://github.com/apache/airflow/pull/75129

   RedactedIO masks registered secrets before writes reach stdout, but its `write()` and `writelines()` missed `bytes` / `bytearray`: those values fall through `_redact()` to the default `return item`, then got stringified as `b'…secret…'`, which wrote the cleartext secret to the underlying stream.
   
   The only production call site is `airflow tasks test`, which routes task output through `RedactedIO`. Any task that ever wrote bytes to `sys.stdout` — common with subprocess wrappers, log buffers, and some logging libraries — had its secrets printed verbatim, while looking like a redaction.
   
   `bytes` and `bytearray` are now decoded as UTF-8 with `errors="replace"` before `redact()` sees them, so the existing pattern-based masker runs. The shared logic is factored into a module-level helper so `write()` and `writelines()` stay symmetric, and the permissive behavior for non-string types added by #72063 is preserved (covered by `test_write_non_string_types_passthrough`).
   
   Tests cover `bytes`, `bytearray`, malformed UTF-8, mixed str/bytes in `writelines`, and the non-string passthrough.
   
   closes: #75069
   
   ##### Was generative AI tooling used to co-author this PR?
   
   - [X] Yes — Minimax-M3
   
   Generated-by: Minimax-M3 following [the guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#gen-ai-assisted-contributions)
   


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