fix: remove duplicate package declaration in test; revert premature snapshotID from spec

- Remove duplicate 'package snapshotcache' line in snapshot_cache_test.go
  (caused compile error, caught by Codex/Gemini review)
- Revert snapshotID field from NewSandbox schema and related descriptions
  in openapi.yml — backend handler not yet implemented, advertising it
  breaks the API contract (caught by Codex P2 review)

Author: adababys

packages/api/internal/cache/snapshots/snapshot_cache_test.go

@@ -1,5 +1,4 @@
 package snapshotcache
-package snapshotcache
 
 import (
 	"testing"

spec/openapi.yml

@@ -633,13 +633,12 @@ components:
             $ref: "#/components/schemas/SandboxMetric"
 
     NewSandbox:
+      required:
+        - templateID
       properties:
         templateID:
           type: string
-          description: Identifier of the required template. Either templateID or snapshotID must be provided.
-        snapshotID:
-          type: string
-          description: Identifier of the snapshot to resume from. Either templateID or snapshotID must be provided. When specified, the sandbox will be created from the snapshot state.
+          description: Identifier of the required template.
         timeout:
           type: integer
           format: int32
@@ -1988,7 +1987,7 @@ paths:
         "500":
           $ref: "#/components/responses/500"
     post:
-      description: Create a sandbox from a template or snapshot. Provide either templateID to create from a template, or snapshotID to resume from a paused sandbox snapshot.
+      description: Create a new sandbox from a template.
       tags: [sandboxes]
       security:
         - ApiKeyAuth: []
@@ -2276,7 +2275,7 @@ paths:
 
   /sandboxes/{sandboxID}/pause:
     post:
-      description: Pause the sandbox. This creates an automatic snapshot of the sandbox state that can be used to resume it later via POST /sandboxes with the snapshotID parameter.
+      description: Pause the sandbox. This creates an automatic snapshot of the sandbox state that can be used to resume it later.
       tags: [sandboxes]
       security:
         - ApiKeyAuth: []
@@ -2299,7 +2298,7 @@ paths:
   /sandboxes/{sandboxID}/resume:
     post:
       deprecated: true
-      description: Resume the sandbox. DEPRECATED - Use POST /sandboxes with snapshotID parameter instead to create a new sandbox from a snapshot.
+      description: Resume the sandbox. DEPRECATED - Use POST /sandboxes instead.
       tags: [sandboxes]
       security:
         - ApiKeyAuth: []
@@ -2315,7 +2314,7 @@ paths:
               $ref: "#/components/schemas/ResumedSandbox"
       responses:
         "201":
-          description: The sandbox was resumed successfully. This endpoint is deprecated - use POST /sandboxes with snapshotID instead.
+          description: The sandbox was resumed successfully. This endpoint is deprecated.
           content:
             application/json:
               schema: