fix(skill-audit): make check 9 reachable, wrap-safe and never silently skipped

Check 9 shipped in #130 to close #118, but three defects meant it could not do the job it was
added for.

Why:
- It is INFO-only, so it always exits 0 — and SKILL.md graded exit 0 "a genuine pass" and said the
  script "prints nothing on success". Every check-9 INFO was discarded before it reached a report,
  behind three further doors that only opened on a non-zero exit.
- `parse_field_raw()` matched `(.+)`, which does not span newlines, so only the first physical line
  of a wrapped value was compared. Rewriting only the continuation line of a wrapped Description
  from a hedge to a confident claim produced no finding at all — verbatim the regression #118 was
  filed about. The bullet branch had the same shape: a wrapped bullet broke the loop and dropped
  every later entry.
- A `git show` failure at the base ref was treated as "creation, nothing to flag" and skipped the
  whole skill with no output, collapsing "absent at that ref" with "not tracked under that name".
  A gitignored `.claude/skills/` copy reported clean while the authoring path reported four changed
  claims. The script's own usage text promises this is "never a silent skip".

Implementation notes:
- Exit-code guidance re-keyed on output as well as code: 0-and-silent passes, 0-with-output is
  INFO-only findings, 1 is FAILs, 2 never ran.
- `parse_field_raw()` is line-based and joins continuation lines; `normalize_field_text()`'s
  docstring is now true rather than aspirational. A reorder deliberately fires: the two fields share
  one parser, and order-insensitivity would mean splitting a prose Description on commas.
- The discarded `show_err` is now surfaced as one whole-check INFO naming both readings.
- `--base-ref=` given empty now beats the env var, as the usage text always claimed.

`validate.sh` gains an ADR-0022 `metadata.version` check at FAIL tier, because any lower tier lets
skill-author Step 4 report done on a file the commit gate then refuses. Its `read` heuristic now
skips here-doc bodies — reflowing the one offending line would have cleared the finding and left
the cause, since every usage() heredoc is one wrap from putting the English verb in column 0.

Impact: provenance tests 73 -> 82, validate tests 64 -> 72. Test 72 previously deleted origin/main
before asserting the override, so it proved the flag works with no default rather than that it beats
one; it now moves origin/main forward first.

Refs: #118
ADR: 0022
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EeH8SCbcrCAQrtymkNuhKP

plugins/kyberforge/.apm/skills/skill-audit/SKILL.md

@@ -7,7 +7,7 @@ description: >
   skill-author.
 allowed-tools: Bash Read
 metadata:
-  version: "1.0.0"
+  version: "1.0.1"
   category: factory
   source_keys:
     - agentskills-home
@@ -36,9 +36,9 @@ bash scripts/vale-wrap.sh <skill-dir>/SKILL.md
 
 `validate.sh` findings become the `### Structure` dimension — its FAILs and its SUGGESTIONs both, at the tier the script assigned. Report each once; never re-grade one under another dimension. Unresolved boundary targets are where this bites, because their tier turns on notation.
 
-If any of the three cannot run, or exits non-zero for a reason other than findings, read `references/validation-scripts.md` — it carries the manual fallback and the misleading exit codes. Ordinary content FAILs are the expected outcome here and need no fallback.
+Read `references/validation-scripts.md` when any of the three cannot run or exits non-zero for a reason other than findings, **and whenever `validate-provenance.sh` exits 0 having printed anything**. Ordinary content FAILs are the expected outcome here and need no fallback.
 
-`validate-provenance.sh` prints nothing on success, so read its exit code before you read its silence. **0** is a genuine pass. **1** means real findings: its FAILs and INFOs become a separate `### Provenance` dimension, and it emits Why and Fix itself — surface those verbatim. **2** means the check never ran — a usage or environment error, reason on stderr, no findings and often no stdout at all. On a 2, report `### Provenance` as unverified and quote the stderr reason. Never grade an exit 2 as a clean pass: empty stdout there means nothing was checked, not that nothing was wrong.
+`validate-provenance.sh` reports through exit code **and** output; neither alone is the verdict. **0, silent** is a genuine pass. **0 with output** is INFO-only findings — still a `### Provenance` dimension; `references/validation-scripts.md` says what each obliges — for a check-9 INFO, reading rather than relaying. **1** is FAILs plus any INFOs; it emits Why and Fix itself — surface those verbatim. **2** means it never ran — a usage or environment error, reason on stderr, often no stdout — so report `### Provenance` unverified and quote that reason. Never grade an exit 2, or an exit 0 that printed, as a clean pass.
 
 `vale-wrap.sh` applies the bundled `Kyberforge` style as a prefilter. Pass no `--config`; the wrapper locates its own. Every rule is graded `error`, so every alert is a FAIL. Report each one citing its rule ID, filed under the dimension it belongs to, and do not re-derive it by judgment: