feat(ms-ai-architect): Sesjon 2 lag 0 - konsolider taksonomi til en sannhetskilde

Ny data/domain-taxonomy.json (tracket via gitignore-negasjon; generert
registry/rapporter forblir ignorert) konsoliderer de 4 divergerende
taksonomiene: (a) sitemap-prefikser, (b) discover INCLUDE/EXCLUDE,
(c) category->skill, (d) getFilePriority. lib/taxonomy.mjs laster + kompilerer.

Refaktor: poll-sitemaps, discover-new-urls, report-changes LESER taksonomien
(ingen embeddede kopier). Kriterium grep TARGET_PREFIXES=[ == 0 oppfylt.

Konsolideringsfunn:
- category-skill-map.json stale i 4 entries (copilot-extensibility,
  monitoring-observability, performance-scalability, prompt-engineering ->
  sa engineering; disk sier advisor/governance/security/advisor). DISK er
  kanon. Map-en er ukonsumert av kode (kun README) -> flagget, ikke rort.
- discover fikk poll-paritet (12 -> 18 sitemap-prefikser).
- skill utledes na fra kanonisk category_skill -> ingen divergens (invariant-test).

Adferdsbevarende: 0 mismatch old vs ny prioritetslogikk pa 51 endrede filer;
discover sine hardkodede skill-verdier matchet allerede disk.
Tester: validate 239, kb-update 49 (+7 taksonomi), kb-eval 13 - alle gronne.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01REiKFhP4w6xGXXqWKpPCJJ

.gitignore

@@ -22,7 +22,10 @@ node_modules/
 # Runtime state
 .work/
 org/
-scripts/kb-update/data/
+# Generated KB-update artifacts (registry, reports) are ignored, but the
+# hand-authored taxonomy (single source of truth, lag 0) is tracked.
+scripts/kb-update/data/*
+!scripts/kb-update/data/domain-taxonomy.json
 .kb-backup/
 .rollback-in-progress