fix(forge): scope the primitive route to apm hooks

- say apm hook/instruction/prompt so pre-commit hooks stay with pc-author
- restore the idea-without-a-home trigger
- cite checkpoints forge's apm routes actually hit
- diff version bumps against the remote default branch

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KkT7RSDwDbmrM9T34b6sTi

plugins/kyberforge/.apm/skills/forge/SKILL.md

@@ -1,10 +1,10 @@
 ---
 name: forge
 description: >
-  Use when the user wants something built or improved but has not yet named
-  its type ("skill or plugin?"). If named, use instead: skill -> `skill-author`,
-  agent -> `agent-author`, hook/instruction/prompt -> `primitive-author`,
-  plugin -> `apm-workflow`.
+  Use when the user wants to build or improve something of unnamed type ("where
+  does this idea go?"). If named, use instead: skill -> `skill-author`, agent ->
+  `agent-author`, apm hook/instruction/prompt -> `primitive-author`, plugin ->
+  `apm-workflow`.
 metadata:
   version: "1.0.2"
   category: factory