fix: skills not bundled and resumeLastSession ignored (FAR-56, FAR-57)

Two bugs prevented skill content from reaching K8s Job prompts, and
resumeLastSession: false was silently ignored.

Skills fix (execute.ts, FAR-57):
- Add /paperclip/.claude/skills as additional candidate to
  readPaperclipRuntimeSkillEntries — the relative candidates in
  adapter-utils don't resolve to the PVC-mounted skills home
- Read entry.source/SKILL.md instead of entry.source (which is a
  directory path); fall back to source directly for file-based entries
- Mock readPaperclipRuntimeSkillEntries in execute.test.ts to prevent
  real SKILL.md reads from delaying fake-timer registration

Session fix (job-manifest.ts, FAR-56):
- Gate --session flag on asBoolean(config.resumeLastSession, true)
  so setting resumeLastSession: false actually stops session resumption
- Default true preserves existing behaviour for agents without config

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "paperclip-adapter-opencode-k8s",
-  "version": "0.1.21",
+  "version": "0.1.22",
   "description": "Paperclip adapter plugin that runs OpenCode agents as Kubernetes Jobs",
   "license": "MIT",
   "type": "module",