Add Server Buddy desktop app with local Linux assessment and reporting

tests/fixtures/synthetic_inventory.json

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+{
+  "schema_version": "1.0",
+  "synthetic": true,
+  "collected_at": "2026-10-01T12:00:00Z",
+  "server": {
+    "hostname": "demo-web-01.example.test",
+    "operating_system": "Windows Server 2022 Standard",
+    "os_build": "20348",
+    "last_boot": "2026-09-25T06:30:00Z",
+    "ip_addresses": [
+      "192.0.2.20"
+    ],
+    "network_adapters": [
+      "Synthetic Ethernet adapter"
+    ],
+    "domain": "example.test"
+  },
+  "checks": {
+    "roles": {
+      "status": "complete",
+      "message": "Synthetic fixture; no remote collection performed."
+    },
+    "services": {
+      "status": "complete",
+      "message": "Synthetic fixture; no remote collection performed."
+    },
+    "network": {
+      "status": "complete",
+      "message": "Synthetic fixture; no remote collection performed."
+    },
+    "tasks": {
+      "status": "complete",
+      "message": "Synthetic fixture; no remote collection performed."
+    },
+    "software": {
+      "status": "complete",
+      "message": "Synthetic fixture; no remote collection performed."
+    },
+    "storage": {
+      "status": "complete",
+      "message": "Synthetic fixture; no remote collection performed."
+    },
+    "certificates": {
+      "status": "complete",
+      "message": "Synthetic fixture; no remote collection performed."
+    },
+    "ad": {
+      "status": "not_collected",
+      "message": "Optional Active Directory enrichment is not implemented."
+    }
+  },
+  "inventory": {
+    "roles": [
+      {
+        "name": "Web-Server",
+        "state": "Installed"
+      },
+      {
+        "name": "File-Services",
+        "state": "Installed"
+      }
+    ],
+    "services": [
+      {
+        "name": "W3SVC",
+        "display_name": "World Wide Web Publishing Service",
+        "state": "Running",
+        "startup": "Automatic",
+        "account": "LocalSystem",
+        "executable": "C:\\Windows\\System32\\svchost.exe"
+      }
+    ],
+    "network": [
+      {
+        "state": "Listen",
+        "local_address": "0.0.0.0",
+        "local_port": 443,
+        "remote_address": "",
+        "remote_port": 0,
+        "pid": 4,
+        "process": "System",
+        "direction": "Unknown"
+      },
+      {
+        "state": "Established",
+        "local_address": "192.0.2.20",
+        "local_port": 443,
+        "remote_address": "192.0.2.45",
+        "remote_port": 52104,
+        "pid": 4,
+        "process": "System",
+        "direction": "Unknown"
+      }
+    ],
+    "tasks": [
+      {
+        "name": "Nightly export",
+        "path": "\\Operations\\",
+        "enabled": true,
+        "account": "EXAMPLE\\svc_export",
+        "executable": "C:\\Operations\\export.exe",
+        "arguments": "[omitted: potentially sensitive]",
+        "triggers": "Daily 02:00"
+      }
+    ],
+    "software": [
+      {
+        "name": "Example Reporting Service",
+        "publisher": "Example Software",
+        "version": "4.2",
+        "installation_date": "2024-06-12"
+      }
+    ],
+    "storage": [
+      {
+        "type": "Volume",
+        "name": "C:",
+        "path": "C:\\",
+        "capacity_gib": 160,
+        "free_gib": 72
+      },
+      {
+        "type": "SMB Share",
+        "name": "Reports",
+        "path": "D:\\Reports",
+        "capacity_gib": null,
+        "free_gib": null
+      }
+    ],
+    "certificates": [
+      {
+        "subject": "CN=demo-web-01.example.test",
+        "issuer": "CN=Example Test CA",
+        "expires": "2027-06-01T00:00:00Z",
+        "thumbprint": "0123456789ABCDEF0123456789ABCDEF01234567"
+      }
+    ]
+  }
+}