feat(WP-0013): IHF Phase 12 — Platform Memory and Continuous Learning

Closes the long-range feedback loop: outcome signals now enrich the full
traceability chain and feed back into routing, triage, and AI proposals.

Schema (T01):
- outcome_correlations (CHECK correlation_type)
- pattern_performance_records
- adaptive_threshold_configs
- institutional_knowledge_entries (GIN tsvector FTS)
- learning_insights (CHECK insight_type)
- ALTER TABLE decision_records + requirement_candidates: outcome_summary JSONB
- AFTER INSERT trigger trg_enrich_lineage on outcome_signals
- contracts/core/ updated (outcome-summary-columns-v1, append-only addendum)

Correlation engine (T02):
- Application/Helper/CorrelationEngine.hs: pure annotation→outcome SQL
- Web/Controller/OutcomeCorrelations.hs: ComputeCorrelationsAction + index

Pattern performance (T03):
- Web/Controller/PatternPerformance.hs: ComputePatternPerformanceAction

Adaptive thresholds (T04):
- Web/Controller/AdaptiveThresholds.hs: CalibrateThresholdsAction
- Application/Helper/FrictionScore.hs: applyAdaptiveWeights

Institutional knowledge (T05):
- DistilDecisionAction in DecisionRecords controller
- Web/Controller/InstitutionalKnowledge.hs: QueryKnowledgeBaseAction

Lineage enrichment (T06):
- Web/Controller/LineageEnrichment.hs: EnrichLineageAction (batch backfill)
- enrich_lineage_on_outcome_batch() PL/pgSQL helper in migration

Learning dashboard (T07):
- Web/Controller/LearningDashboard.hs: 5-panel autoRefresh view
- "Learning" nav link in FrontController

API v2 learning endpoints (T08):
- GET /api/v2/outcome-correlations, /pattern-performance, /knowledge-base/{id}
- OpenAPI schemas: OutcomeCorrelation, PatternPerformanceRecord, InstitutionalKnowledgeEntry

GAAF scorecard + docs (T09):
- Core 3.8→3.9, Functional 3.6→3.8, overall 3.61→3.68
- CLAUDE.md: IHF v0.2 complete, no active workplan

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Web/Controller/LineageEnrichment.hs

@@ -0,0 +1,42 @@
+module Web.Controller.LineageEnrichment where
+
+-- IHF Phase 12 — Platform Memory (IHUB-WP-0013 T06)
+-- The AFTER INSERT trigger trg_enrich_lineage handles real-time enrichment.
+-- This controller provides on-demand batch backfill for existing records.
+
+import Web.Controller.Prelude
+import Web.View.LineageEnrichment.Index
+import IHP.ModelSupport (sqlQuery)
+import Database.PostgreSQL.Simple (Only(..))
+
+instance Controller LineageEnrichmentController where
+    beforeAction = ensureIsUser
+
+    action LineageEnrichmentAction = do
+        hubs <- query @Hub |> orderByAsc #name |> fetch
+        -- Count unenriched decisions per hub
+        counts <- sqlQuery
+            "SELECT dr.hub_id, COUNT(*) FILTER (WHERE dr.outcome_summary IS NULL)::int AS unenriched \
+            \ FROM decision_records dr \
+            \ GROUP BY dr.hub_id"
+            ()
+            :: IO [(Id Hub, Int)]
+        render IndexView { hubs, counts }
+
+    action EnrichLineageAction { hubIdForLineage } = do
+        let hubId = hubIdForLineage
+        -- Batch-call the trigger logic via a PL/pgSQL function for all
+        -- outcome_signals in this hub that haven't yet enriched their chain.
+        [Only enriched] <- sqlQuery
+            "SELECT COUNT(*) FROM ( \
+            \    SELECT enrich_lineage_on_outcome_batch(os.id) \
+            \    FROM outcome_signals os \
+            \    JOIN deployment_records dep ON dep.id = os.deployment_id \
+            \    JOIN decision_records dr ON dr.id = dep.decision_id \
+            \    WHERE dr.hub_id = ? \
+            \      AND dr.outcome_summary IS NULL \
+            \ ) sub"
+            [hubId]
+            :: IO [Only Int]
+        setSuccessMessage ("Lineage enriched for " <> show enriched <> " signals")
+        redirectTo LineageEnrichmentAction