Stop tracking Python bytecode in watcher service

- remove the committed watcher-service __pycache__ bytecode file from git tracking
- ignore Python bytecode artifacts so generated .pyc files do not get committed again
- keep the watcher-service source files as the only tracked implementation artifacts

.gitignore

@@ -1,2 +1,8 @@
 log/
 .env.credentials.local
+.vscode/
+atvm/tmp/
+
+# Python bytecode
+__pycache__/
+*.pyc