Read all env vars from pod spec instead of static allowlist

- Remove INHERITED_ENV_KEYS; read directly from mainContainer.env
- Any Deployment env var is now forwarded automatically to Job pods
- Layer ordering preserved: pod spec → paperclip vars → agent config env

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@farhoodliquor/paperclip-adapter-opencode-k8s",
-  "version": "0.1.5",
+  "version": "0.1.6",
   "description": "Paperclip adapter plugin that runs OpenCode agents as Kubernetes Jobs",
   "license": "MIT",
   "type": "module",