Feat/validator causal analytics

[fklosowski]

Three feature releases (0.6.0, 0.7.0, 0.7.1) shipped on top of
0.5.2. Net effect: validator went from "catches problems" to
"attributes, scores, and self-corrects" via a rule engine + an
end-to-end-trustworthy analytics pipeline.

Headline numbers

• Rule modules: 0 → 86.
• Fix-proposal rate (DEMO): ~0 → 45 / 99 (45%).
• Confidence coverage: 0% → 89% of emits.
• Health score (DEMO): 91 → 95 / 100.
• Tests: ~+200 unit + ~+25 integration; suite at HEAD 1825+ / 1826, all green except one pre-existing flake.
• Analytics schema: migrated v1 → v6 (idempotent, no
  backfills).
• pos-cli 0.6.7 + current LSP + modernized modules support

What changed

Analytics pipeline (0.6.0)

• Fixed three silent bugs: outcomes.fix_applied always null,
  hint_md_hash dropped on ingest, heuristic fixes never reached
  analytics. Numbers were misleading before this.
• A1–A4: outcome dedup, default-confidence stamping, gating
  dashboard_live calls out of analytics, ${check}.unmatched
  fallback for unattributed emits.
• Manual rule overrides
  (force_enable / force_disable / clear) persisted at
  .pos-supervisor/rule-overrides.json + dashboard form.
• New endpoints: /api/blob, /api/engine/impact,
  /api/engine/rule-overrides,
  /api/analytics/fix-rule-performance.

Rule engine + hint quality (0.6.0 → 0.7.0)

• Neuro-symbolic engine introduced with bridgeRulesOntoUnattributed
  late-push attribution.
• AT-RISK rules rewritten: MissingPartial.module_path now
  enumerates real module paths via Levenshtein;
  TranslationKeyExists.suggest_nearest strips locale prefixes (was
  re-breaking t lookups); NonGetRenderingPage split into 3
  intent-aware subrules; InvalidLayout picks
  .liquid vs .html.liquid from existing layouts.
• 13 bucket-B .unmatched checks promoted to rule modules with
  structured guidance (DeprecatedTag, PartialCallArguments,
  GraphQLVariablesCheck, MissingAsset, MissingPage,
  LiquidHTMLSyntaxError, OrphanedPartial, SchemaProperty,
  SchemaYAML, MissingSlug, MissingContentForLayout,
  ParserBlockingScript, TranslationMissingLocaleKey,
  UnusedDocParam).
• New structural check pos-supervisor:NonGetRenderingPage +
  pipeline step verifyMissingPartialsOnDisk (suppresses
  scaffold-write race).
• pos-supervisor:HtmlInPage suppressed on partial-rendering pages;
  pos-supervisor:MissingDocBlock scope narrowed to partials only.

Parser blind-spot + dashboard fix (0.7.1)

• GraphQLVariablesCheck.required regression spiral fixed: parser
  now flags {% graphql %} calls truncated by multi-line , inside
  {% liquid %} blocks. New sub-rule parser_blind_spot + new
  structural check pos-supervisor:GraphqlMultilineInLiquidBlock
  redirect agent at the syntactic root cause instead of looping.
• Dashboard GET /api/hints 404 fixed for the 12+ rule-driven
  checks with no static .md file — endpoint now branches
  static / rule, drilldown panel shows [RULE-DRIVEN] /
  [STATIC] source badge and the correct file path.

Dashboard

• POS-CLI tab (data-clean / deploy) — 0.5.2.
• Adaptive Mode Impact panel, code-context drilldown, journey
  timeline clickable nodes, confidence column, live-console picker
  sync, override form — 0.6.0.
• Source-aware hint drilldown — 0.7.1.