Publish v2 pull enabled flag

Author: MarcelGeo

server/mergin/sync/config.py

@@ -75,3 +75,5 @@ class Configuration(object):
     UPLOAD_CHUNKS_EXPIRATION = config(
         "UPLOAD_CHUNKS_EXPIRATION", default=86400, cast=int
     )
+    # whether client can pull using v2 apis
+    V2_PULL_ENABLED = config("V2_PULL_ENABLED", default=True, cast=bool)

server/mergin/tests/fixtures.py

@@ -36,6 +36,7 @@ def flask_app(request):
             "COLLECT_STATISTICS",
             "USER_SELF_REGISTRATION",
             "V2_PUSH_ENABLED",
+            "V2_PULL_ENABLED",
         ]
     )
     register(application)

server/mergin/tests/test_config.py

@@ -22,6 +22,7 @@ def test_config(client):
         "user_self_registration",
         "build_hash",
         "v2_push_enabled",
+        "v2_pull_enabled",
     }
     resp = client.get("/config")
     assert resp.status_code == 200