feat: instructionsFilePath config field + skill bundle materialization

- config-schema: add instructionsFilePath UI field (Core group, text type)
- server/index.ts: set supportsInstructionsBundle=true, instructionsPathKey="instructionsFilePath"
- execute.ts: read instructionsFilePath file + desired skill markdown files from PVC; pass to buildJobManifest as instructionsContent / skillsBundleContent
- job-manifest.ts: accept instructionsContent + skillsBundleContent in JobBuildInput; prepend both to prompt via joinPromptSections; add instructionsChars + skillsBundleChars to promptMetrics
- index.ts: document instructionsFilePath and skills injection in agentConfigurationDoc
- CLAUDE.md: document skill materialization (ephemeral mode) and instructionsFilePath field
- Bump version to 0.1.18

Co-Authored-By: Paperclip <noreply@paperclip.ing>

package-lock.json

@@ -1,15 +1,16 @@
 {
-  "name": "@farhoodliquor/paperclip-adapter-opencode-k8s",
-  "version": "0.1.16",
+  "name": "paperclip-adapter-opencode-k8s",
+  "version": "0.1.18",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
-      "name": "@farhoodliquor/paperclip-adapter-opencode-k8s",
-      "version": "0.1.16",
+      "name": "paperclip-adapter-opencode-k8s",
+      "version": "0.1.18",
       "license": "MIT",
       "dependencies": {
-        "@kubernetes/client-node": "^1.0.0"
+        "@kubernetes/client-node": "^1.0.0",
+        "picocolors": "^1.1.1"
       },
       "devDependencies": {
         "@paperclipai/adapter-utils": "2026.415.0-canary.7",
@@ -18,7 +19,7 @@
         "vitest": "^4.1.4"
       },
       "peerDependencies": {
-        "@paperclipai/adapter-utils": "2026.415.0-canary.7"
+        "@paperclipai/adapter-utils": ">=2026.415.0-canary.7"
       }
     },
     "node_modules/@emnapi/core": {
@@ -1574,7 +1575,6 @@
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
       "integrity": "sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA==",
-      "dev": true,
       "license": "ISC"
     },
     "node_modules/picomatch": {