chore(humanizer): pre-flight snapshots + test audit for v5.1.0

Wave 0 / Step 0 of the v5.1.0 plain-language UX humanizer plan.

Captures v5.0.0 baseline output for all 8 CLIs at
tests/snapshots/v5.0.0/ — these snapshots are immutable references
for SC-6 (--json byte-equal) and SC-7 (--raw byte-equal) tests in
later waves.

- 5 CLIs captured via --output-file: scan-orchestrator, posture,
  token-hotspots-cli, manifest, whats-active
- 3 CLIs captured via stdout redirect (no --output-file support):
  drift-cli (after baseline seed), fix-cli, plugin-health-scanner
- Posture stderr scorecard captured separately for SC-7 stderr-mode
  comparison

docs/v5.1.0-test-audit.md classifies all 42 .title references in
7 known test files: 34 will break under humanization (literal
string equality / substring), 8 are safe (test fixtures or error
formatting). This document is the change list for Step 4.

Project: .claude/projects/2026-05-01-config-audit-ux-redesign/

plugins/config-audit/tests/snapshots/v5.0.0-stderr/posture.txt

@@ -0,0 +1,30 @@
+  [CML] CLAUDE.md Linter: 0 finding(s) (9ms)
+  [SET] Settings Validator: 0 finding(s) (0ms)
+  [HKV] Hook Validator: 0 finding(s) (2ms)
+  [RUL] Rules Validator: 0 finding(s) (0ms)
+  [MCP] MCP Config Validator: 0 finding(s) (1ms)
+  [IMP] Import Resolver: 0 finding(s) (1ms)
+  [CNF] Conflict Detector: 0 finding(s) (1ms)
+  [GAP] Feature Gap Scanner: 17 finding(s) (3ms)
+  [TOK] Token Hotspots: 1 finding(s) (116ms)
+  [CPS] Cache-Prefix Stability: 0 finding(s) (1ms)
+  [DIS] Disabled-In-Schema: 1 finding(s) (1ms)
+  [COL] Plugin Skill Collision: 1 finding(s) (77ms)
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+ Config-Audit Health Score
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+ Health: A (97/100)    9 areas scanned
+
+ Area Scores
+ ───────────
+ CLAUDE.md ........... A (100)     Settings ............ A (90)
+ Hooks ............... A (100)     Rules ............... A (100)
+ MCP ................. A (100)     Imports ............. A (100)
+ Conflicts ........... A (100)     Token Efficiency .... A (90)
+ Plugin Hygiene ...... A (90)
+
+ 17 opportunities available — run /config-audit feature-gap for recommendations
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━