Add optional photo providers, layout studio and scoped integrations

pigway_frame_flow/extensions/secrets.py

@@ -0,0 +1,18 @@
+"""Atomic mode-0600 secrets; filenames supplied by application code, never callers."""
+
+import os
+import tempfile
+from pathlib import Path
+
+
+def save_secret(path, value):
+    with tempfile.NamedTemporaryFile(mode="w", dir=path.parent, delete=False) as file:
+        temporary = Path(file.name)
+        try:
+            file.write(value)
+            file.flush()
+            os.fsync(file.fileno())
+            temporary.chmod(0o600)
+            os.replace(temporary, path)
+        finally:
+            temporary.unlink(missing_ok=True)