feat: local storage logic & endpoints

app/core/hashing.py

@@ -0,0 +1,12 @@
+"""File hashing utilities."""
+
+import hashlib
+from pathlib import Path
+
+
+def sha256_of_file(path: Path) -> str:
+    h = hashlib.sha256()
+    with open(path, "rb") as f:
+        for chunk in iter(lambda: f.read(65536), b""):
+            h.update(chunk)
+    return h.hexdigest()