✨ Add naming consistency changes for file_data_fragment table

frontend/playwright/data/viewer/get-file-fragment-empty-file.json

@@ -2,7 +2,7 @@
     "~:id": "~u0515a066-e303-8169-8004-73eb58e899c2",
     "~:file-id": "~uc7ce0794-0992-8105-8004-38f280443849",
     "~:created-at": "~m1717493890966",
-    "~:content": {
+    "~:data": {
         "~:options": {},
         "~:objects": {
             "~u00000000-0000-0000-0000-000000000000": {
@@ -94,4 +94,4 @@
         "~:id": "~uc7ce0794-0992-8105-8004-38f28044384a",
         "~:name": "Page 1"
     }
-}
+}

frontend/playwright/data/viewer/get-file-fragment-single-board.json

@@ -2,7 +2,7 @@
     "~:id": "~udd5cc0bb-91ff-81b9-8004-77dfae2d9e7c",
     "~:file-id": "~udd5cc0bb-91ff-81b9-8004-77df9cd3edb1",
     "~:created-at": "~m1717759268004",
-    "~:content": {
+    "~:data": {
         "~:options": {},
         "~:objects": {
             "~u00000000-0000-0000-0000-000000000000": {
@@ -183,4 +183,4 @@
         "~:id": "~udd5cc0bb-91ff-81b9-8004-77df9cd3edb2",
         "~:name": "Page 1"
     }
-}
+}