⚡️ Speed up function get_cached_gh_event_data by 31% in PR #371 (chore/error-on-missing-key-in-fork)

Here’s a faster and more memory-efficient version of your program.  
**Optimization rationale:**
- Avoids the extra `Path` object creation and `.open()` call—using `open(event_path)` is faster for a single use.
- Reduces dependency usage by not involving `Path` unless file system path manipulation is needed.
- Leaves error handling as originally absent, maintaining original logic.
- Leaves `lru_cache` as is and all function/return types unchanged.


**Summary of change:**  
Direct file open instead of through `Path`, removing unnecessary abstraction for a single read and reducing overhead. All logic and return values are identical.

Author: codeflash-ai[bot]

codeflash/code_utils/env_utils.py

@@ -107,5 +107,5 @@ def get_cached_gh_event_data() -> dict[str, Any] | None:
     event_path = os.getenv("GITHUB_EVENT_PATH")
     if not event_path:
         return None
-    with Path(event_path).open() as f:
+    with open(event_path) as f:  # Open file directly for efficiency
         return json.load(f)  # type: ignore  # noqa