Fix schema consistency in JSON fixtures

- Add missing isAvailable field to device-list schema in resources/devices--success.json
- Add missing diagnostics field to simulator success fixtures (stop, install, launch-app)

Author: cursoragent

src/snapshot-tests/__fixtures__/json/resources/devices--success.json

@@ -6,32 +6,36 @@
   "data": {
     "devices": [
       {
-        "name": "Cameron’s iPhone 16 Pro Max",
+        "name": "Cameron's iPhone 16 Pro Max",
         "deviceId": "<UUID>",
         "platform": "iOS",
         "osVersion": "26.3.1 (a)",
-        "state": "<STATUS>"
+        "state": "<STATUS>",
+        "isAvailable": true
       },
       {
         "name": "iPhone",
         "deviceId": "<UUID>",
         "platform": "iOS",
         "osVersion": "26.1",
-        "state": "<STATUS>"
+        "state": "<STATUS>",
+        "isAvailable": false
       },
       {
-        "name": "Cameron’s Apple Watch",
+        "name": "Cameron's Apple Watch",
         "deviceId": "<UUID>",
         "platform": "watchOS",
         "osVersion": "10.6.1",
-        "state": "<STATUS>"
+        "state": "<STATUS>",
+        "isAvailable": false
       },
       {
-        "name": "Cameron’s Apple Watch",
+        "name": "Cameron's Apple Watch",
         "deviceId": "<UUID>",
         "platform": "watchOS",
         "osVersion": "26.3",
-        "state": "<STATUS>"
+        "state": "<STATUS>",
+        "isAvailable": true
       }
     ]
   }

src/snapshot-tests/__fixtures__/json/simulator/install--success.json

@@ -10,6 +10,10 @@
     "artifacts": {
       "simulatorId": "<UUID>",
       "appPath": "<HOME>/Library/Developer/XcodeBuildMCP/DerivedData/Build/Products/Debug-iphonesimulator/CalculatorApp.app"
+    },
+    "diagnostics": {
+      "warnings": [],
+      "errors": []
     }
   }
 }

src/snapshot-tests/__fixtures__/json/simulator/launch-app--success.json

@@ -13,6 +13,10 @@
       "processId": "<PID>",
       "runtimeLogPath": "<HOME>/Library/Developer/XcodeBuildMCP/logs/io.sentry.calculatorapp_<TIMESTAMP>_pid<PID>.log",
       "osLogPath": "<HOME>/Library/Developer/XcodeBuildMCP/logs/io.sentry.calculatorapp_oslog_<TIMESTAMP>_pid<PID>.log"
+    },
+    "diagnostics": {
+      "warnings": [],
+      "errors": []
     }
   }
 }

src/snapshot-tests/__fixtures__/json/simulator/stop--success.json

@@ -10,6 +10,10 @@
     "artifacts": {
       "simulatorId": "<UUID>",
       "bundleId": "io.sentry.calculatorapp"
+    },
+    "diagnostics": {
+      "warnings": [],
+      "errors": []
     }
   }
 }