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

scripts/kb-update/poll-sitemaps.mjs

@@ -8,36 +8,16 @@ import { fileURLToPath } from 'node:url';
 import { normalizeUrl } from './lib/url-normalize.mjs';
 import { loadRegistry, saveRegistry } from './lib/registry-io.mjs';
 import { fetchSitemapIndex, streamSitemap } from './lib/sitemap-stream.mjs';
+import { loadTaxonomy, getSitemapPrefixes } from './lib/taxonomy.mjs';
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 const DATA_DIR = join(__dirname, 'data');
 const force = process.argv.includes('--force');
 const verbose = process.argv.includes('--verbose');
 
-// Target child sitemaps — covers all URL path prefixes in the registry.
-// Derived from analyzing which sitemaps contain our 1342 tracked URLs.
-const TARGET_PREFIXES = [
-  'azure_en-us_',
-  'microsoft-copilot-studio_en-us_',
-  'security_en-us_',
-  'fabric_en-us_',
-  'power-platform_en-us_',
-  'ai_en-us_',
-  'copilot_en-us_',
-  'compliance_en-us_',
-  'agent-framework_en-us_',
-  'semantic-kernel_en-us_',
-  'entra_en-us_',
-  'purview_en-us_',
-  'microsoftteams_en-us_',
-  'sharepoint_en-us_',
-  'microsoft-365_en-us_',
-  'training_en-us_',
-  'cloud-computing_en-us_',
-  'privacy_en-us_',
-  // dotnet_en-us_ excluded: 75 sitemaps, only 12 matches. Not worth weekly polling.
-  // Re-enable with --force if needed.
-];
+// Target sitemap prefixes come from the consolidated taxonomy (lag 0) — the
+// single source of truth shared with discover-new-urls.
+const TARGET_PREFIXES = getSitemapPrefixes(loadTaxonomy(DATA_DIR));
 
 function extractChildName(loc) {
   // https://learn.microsoft.com/_sitemaps/azure_en-us_7.xml → azure_en-us_7