feat(firewall): add install context query and API endpoint for firewall client setup

Introduced a new API endpoint for retrieving the install context of the firewall client, which includes the bundle seed, configuration status, and suggested control plane URL. Updated the frontend to utilize this new endpoint, enhancing the user experience by dynamically displaying relevant information. Additionally, added type definitions for the install context and integrated it into the existing firewall management flow.

docs/openapi.yaml

@@ -1608,6 +1608,22 @@ components:
         client_version:
           type: string
 
+    FirewallInstallContext:
+      type: object
+      description: Контекст для one-liner установки firewall-клиента (только operator).
+      properties:
+        bundle_seed:
+          type: string
+          description: Значение EVOBGP_BUNDLE_SEED_HEX на control plane.
+        bundle_seed_configured:
+          type: boolean
+        suggested_cp_url:
+          type: string
+          format: uri
+        install_sh_url:
+          type: string
+          format: uri
+
     FirewallRule:
       type: object
       properties:
@@ -4364,6 +4380,23 @@ paths:
         default:
           $ref: "#/components/responses/DefaultProblem"
 
+  /v1/firewall/install-context:
+    get:
+      tags: [Firewall]
+      summary: Install context for firewall one-liner (operator)
+      operationId: getFirewallInstallContext
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/FirewallInstallContext"
+        "403":
+          $ref: "#/components/responses/Forbidden"
+        default:
+          $ref: "#/components/responses/DefaultProblem"
+
   /v1/firewall/enroll:
     post:
       tags: [Firewall]