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/Routes.hs

@@ -268,5 +268,35 @@ instance AutoRoute AgentDelegationsController
 instance AutoRoute CollectiveProposalsController
 instance AutoRoute AiGovernancePoliciesController
 
+-- Phase 12 — Platform Memory and Continuous Learning (IHUB-WP-0013)
+instance AutoRoute OutcomeCorrelationsController
+instance AutoRoute PatternPerformanceController
+instance AutoRoute AdaptiveThresholdsController
+instance AutoRoute InstitutionalKnowledgeController
+instance AutoRoute LineageEnrichmentController
+instance AutoRoute LearningDashboardController
+
+instance CanRoute ApiV2LearningController where
+    parseRoute' = do
+        _ <- string "/api/v2"
+        choice
+            [ do _ <- string "/outcome-correlations"; endOfInput
+                 pure ApiV2IndexOutcomeCorrelationsAction
+            , do _ <- string "/pattern-performance"; endOfInput
+                 pure ApiV2IndexPatternPerformanceAction
+            , do _ <- string "/knowledge-base"
+                 choice
+                    [ do endOfInput; pure ApiV2IndexKnowledgeBaseAction
+                    , do _ <- string "/"; eid <- parseUUID; endOfInput
+                         pure ApiV2ShowKnowledgeBaseAction { knowledgeEntryId = Id eid }
+                    ]
+            ]
+
+instance HasPath ApiV2LearningController where
+    pathTo ApiV2IndexOutcomeCorrelationsAction = "/api/v2/outcome-correlations"
+    pathTo ApiV2IndexPatternPerformanceAction  = "/api/v2/pattern-performance"
+    pathTo ApiV2IndexKnowledgeBaseAction       = "/api/v2/knowledge-base"
+    pathTo ApiV2ShowKnowledgeBaseAction { knowledgeEntryId } = "/api/v2/knowledge-base/" <> show knowledgeEntryId
+
 -- Sessions
 instance AutoRoute SessionsController