fix(platform): govern geospatial analysis and raster handoffs

backend/tests/test_sprint7a_persistence_foundation.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import asyncio
+import json
 from pathlib import Path
 from uuid import uuid4
 
@@ -187,23 +188,31 @@ def test_dataset_upload_persists_vector_features(monkeypatch, tmp_path) -> None:
         filename = "reference.geojson"
         content_type = "application/geo+json"
 
-        async def read(self) -> bytes:
+        def __init__(self) -> None:
             import json
 
-            return json.dumps(payload).encode("utf-8")
+            self._content = json.dumps(payload).encode("utf-8")
+
+        async def read(self, size: int) -> bytes:
+            chunk, self._content = self._content[:size], self._content[size:]
+            return chunk
 
     storage_path = tmp_path / "reference.geojson"
-    storage_path.write_text("{}", encoding="utf-8")
-    monkeypatch.setattr(
-        "app.services.dataset_service.StorageService.persist_dataset_file",
-        lambda **_kwargs: {
+    storage_path.write_text(json.dumps(payload), encoding="utf-8")
+
+    async def persist_upload_file(**_kwargs):
+        return {
             "storage_path": str(storage_path),
             "original_filename": "reference.geojson",
             "stored_filename": "reference.geojson",
             "content_type": "application/geo+json",
-            "size_bytes": 2,
+            "size_bytes": storage_path.stat().st_size,
             "checksum_sha256": "0" * 64,
-        },
+        }
+
+    monkeypatch.setattr(
+        "app.services.dataset_service.StorageService.persist_upload_file",
+        persist_upload_file,
     )
 
     result = asyncio.run(
@@ -236,19 +245,28 @@ def test_dataset_upload_rolls_back_dataset_and_file_when_vector_indexing_fails(m
         filename = "invalid.geojson"
         content_type = "application/geo+json"
 
-        async def read(self) -> bytes:
-            return b'{"type":"FeatureCollection","features":[]}'
+        def __init__(self) -> None:
+            self._content = b'{"type":"FeatureCollection","features":[]}'
 
-    monkeypatch.setattr(
-        "app.services.dataset_service.StorageService.persist_dataset_file",
-        lambda **_kwargs: {
+        async def read(self, size: int) -> bytes:
+            chunk, self._content = self._content[:size], self._content[size:]
+            return chunk
+
+    storage_path.write_text('{"type":"FeatureCollection","features":[]}', encoding="utf-8")
+
+    async def persist_upload_file(**_kwargs):
+        return {
             "storage_path": str(storage_path),
             "original_filename": "invalid.geojson",
             "stored_filename": "invalid.geojson",
             "content_type": "application/geo+json",
-            "size_bytes": 2,
+            "size_bytes": storage_path.stat().st_size,
             "checksum_sha256": "0" * 64,
-        },
+        }
+
+    monkeypatch.setattr(
+        "app.services.dataset_service.StorageService.persist_upload_file",
+        persist_upload_file,
     )
     monkeypatch.setattr(
         VectorFeatureService,