fix(kyberforge): align primitive-author and factory-audit rule tiers

Second clean-context audit found author Must/Should and audit FAIL/SUGGESTION
tiers drifting apart, and author Musts the audit never checked.

- factory-audit: FAIL on absolute or bare relative hook script paths, an
  applyTo present but empty, and unbalanced braces/brackets in applyTo;
  judgment steps for dependency stem collisions, helper .json in hook dirs,
  unresolvable instruction links, prompt model slugs and second-person
  bodies; an unmatched glob drops to SUGGESTION; deliberate tier deviations
  recorded in hook-flow.md; validate.sh --help lists the three new modes;
  DescriptionOpener message no longer prescribes "Use when".
- primitive-author: deprecated routing, extra prompt keys and the prompt
  description contract become Shoulds; hook Musts gain "contributes an
  entry", no bare relative paths, and executable-when-run-directly;
  prompt Must 1 covers hardlinks; Vale prose FAILs resolved at close.
- forge: say "hook, instruction or prompt" rather than "apm primitive".

Refs #94

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

plugins/kyberforge/.apm/skills/factory-audit/scripts/validate.sh

@@ -145,16 +145,20 @@ At project or user scope, <agent-file> is either half of a Claude Code .md /
 Copilot .agent.md pair.
 
 Arguments:
-  skill-dir   Path to the skill directory containing SKILL.md.
-  agent-file  Path to the agent file (or either half of a project/user-scope pair).
+  skill-dir         Path to the skill directory containing SKILL.md.
+  agent-file        Path to the agent file (or either half of a project/user-scope pair).
+  hook-file         Path to a hook JSON file directly under .apm/hooks/ or hooks/.
+  instruction-file  Path to a *.instructions.md file.
+  prompt-file       Path to a *.prompt.md file.
 
 Exit codes:
   0  All checks passed (may include SUGGESTIONs)
   1  One or more checks failed
   2  Nothing was audited (no argument, the target matches no shape, the
      target does not exist, an unrecognized file extension, a missing
-     references/agent-field-inventory.md, or a missing or unreadable lib-*.sh
-     beside this script)
+     references/agent-field-inventory.md, a missing or unreadable lib-*.sh
+     beside this script, or, for a hook, instruction or prompt, a missing
+     python3 or PyYAML)
 EOF
 }