chore: show hosting in connected edges (#10995)

https://linear.app/unleash/issue/2-4037/show-hosting-in-connected-edges-edge-observability

Show "hosting" in Connected Edges.

This can be one of:
 - Cloud
 - Self-hosted
 - Unknown

<img width="326" height="691" alt="image"
src="https://github.com/user-attachments/assets/baba1fbb-6f22-46f5-8271-4f4a0c3fcc8a"
/>

frontend/src/component/admin/network/NetworkConnectedEdges/NetworkConnectedEdgeInstance.tsx

@@ -82,6 +82,19 @@ const StyledBadge = styled(Badge)(({ theme }) => ({
     padding: theme.spacing(0, 1),
 }));
 
+const getHosting = ({
+    hosting,
+}: ConnectedEdge): 'Cloud' | 'Self-hosted' | 'Unknown' => {
+    switch (hosting) {
+        case 'hosted':
+            return 'Cloud';
+        case 'enterprise-self-hosted':
+            return 'Self-hosted';
+        default:
+            return hosting ? `Unknown: ${hosting}` : 'Unknown';
+    }
+};
+
 const getConnectionStatus = ({
     reportedAt,
 }: ConnectedEdge): InstanceConnectionStatus => {
@@ -178,6 +191,10 @@ export const NetworkConnectedEdgeInstance = ({
                         <strong>Region</strong>
                         <span>{instance.region || 'Unknown'}</span>
                     </StyledDetailRow>
+                    <StyledDetailRow>
+                        <strong>Hosting</strong>
+                        <span>{getHosting(instance)}</span>
+                    </StyledDetailRow>
                     <StyledDetailRow>
                         <strong>Version</strong>
                         <span>{instance.edgeVersion}</span>

frontend/src/interfaces/connectedEdge.ts

@@ -5,6 +5,7 @@ export type ConnectedEdge = {
     edgeVersion: string;
     instanceId: string;
     region: string | null;
+    hosting?: 'hosted' | 'enterprise-self-hosted';
     reportedAt: string;
     started: string;
     connectedVia?: string;

src/migrations/20251118131212-edge-observability-hosting.js

@@ -0,0 +1,19 @@
+exports.up = function(db, cb) {
+    db.runSql(
+        `
+        ALTER TABLE stat_edge_observability
+        ADD COLUMN hosting TEXT;
+        `,
+        cb,
+    );
+};
+
+exports.down = function(db, cb) {
+    db.runSql(
+        `
+        ALTER TABLE stat_edge_observability
+        DROP COLUMN IF EXISTS hosting;
+        `,
+        cb,
+    );
+};