Simplify version endpoint caching to indefinite cache

Since containers restart on content changes, remove TTL-based cache expiration
and cache version information indefinitely. This provides maximum performance
benefit while maintaining correctness.

- Remove timestamp-based cache expiration logic
- Cache version info indefinitely until container restart
- Simplify caching function by removing TTL complexity
- Maintain optimized git log file reading

ivatar/views.py

@@ -845,11 +845,9 @@ class StatsView(TemplateView, JsonResponse):
         return JsonResponse(retval)
 
 
-# Thread-safe version cache with timestamp
+# Thread-safe version cache - cached indefinitely since container restarts on changes
 _version_cache = None
-_version_cache_timestamp = None
 _version_cache_lock = threading.Lock()
-_VERSION_CACHE_TTL = 300  # 5 minutes cache TTL
 
 
 def _get_git_info_from_files():
@@ -957,33 +955,22 @@ def _get_git_info_from_files():
 
 def _get_cached_version_info():
     """
-    Get cached version information, loading it if not available or expired
+    Get cached version information, loading it if not available
+    Since containers restart on content changes, cache indefinitely
     """
-    global _version_cache, _version_cache_timestamp
+    global _version_cache
-    import time
 
     with _version_cache_lock:
-        current_time = time.time()
+        if _version_cache is None:
-
-        # Check if cache is expired or doesn't exist
-        if (
-            _version_cache is None
-            or _version_cache_timestamp is None
-            or current_time - _version_cache_timestamp > _VERSION_CACHE_TTL
-        ):
-
             # Get version info from git files
             _version_cache = _get_git_info_from_files()
-            _version_cache_timestamp = current_time
 
-            # If that fails, return error but don't cache it for long
+            # If that fails, return error
             if _version_cache is None:
                 _version_cache = {
                     "error": "Unable to determine version - .git directory not found",
                     "deployment_status": "unknown",
                 }
-                # Set shorter TTL for error cases to allow retry
-                _version_cache_timestamp = current_time - _VERSION_CACHE_TTL + 30
 
         return _version_cache