feat: Update version handling and validation in transcribe_me module

- Add default version "0.0.0" if not specified in environment variable
- Validate version format with three parts and all parts being digits in [transcribe_me/__init__.py]

Author: johnnyhuy

transcribe_me/__init__.py

@@ -1,7 +1,8 @@
 import os
 
-__version__ = os.environ.get("VERSION")
+__version__ = os.environ.get("VERSION", "0.0.0")
+
+parts = __version__.split(".")
+if len(parts) != 3 or not all(part.isdigit() for part in parts):
+    __version__ = "0.0.0"
 
-if __version__ is None:
-    print("Error: VERSION environment variable is not set.")
-    exit(1)