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/InstitutionalKnowledge.hs

@@ -0,0 +1,49 @@
+module Web.Controller.InstitutionalKnowledge where
+
+-- IHF Phase 12 — Platform Memory (IHUB-WP-0013 T05)
+
+import Web.Controller.Prelude
+import Web.View.InstitutionalKnowledge.Index
+import Web.View.InstitutionalKnowledge.Show
+import IHP.ModelSupport (sqlQuery)
+
+instance Controller InstitutionalKnowledgeController where
+    beforeAction = ensureIsUser
+
+    action InstitutionalKnowledgeAction = do
+        entries <- query @InstitutionalKnowledgeEntry
+            |> orderByDesc #createdAt
+            |> limit 50
+            |> fetch
+        hubs <- query @Hub |> fetch
+        render IndexView { entries, hubs, mQuery = Nothing }
+
+    action ShowInstitutionalKnowledgeAction { knowledgeEntryId } = do
+        entry <- fetch knowledgeEntryId
+        hub   <- fetch entry.hubId
+        mDecision <- case entry.decisionRecordId of
+            Nothing  -> pure Nothing
+            Just did -> fetchOneOrNothing did
+        render ShowView { entry, hub, mDecision }
+
+    action QueryKnowledgeBaseAction = do
+        q        <- param @Text "q"
+        mHubStr  <- paramOrNothing @Text "hubId"
+        hubs     <- query @Hub |> fetch
+        entries  <- case mHubStr of
+            Nothing ->
+                sqlQuery
+                    "SELECT * FROM institutional_knowledge_entries \
+                    \ WHERE summary_tsv @@ plainto_tsquery('english', ?) \
+                    \ ORDER BY ts_rank(summary_tsv, plainto_tsquery('english', ?)) DESC \
+                    \ LIMIT 20"
+                    (q, q)
+            Just hid ->
+                sqlQuery
+                    "SELECT * FROM institutional_knowledge_entries \
+                    \ WHERE hub_id = ? \
+                    \   AND summary_tsv @@ plainto_tsquery('english', ?) \
+                    \ ORDER BY ts_rank(summary_tsv, plainto_tsquery('english', ?)) DESC \
+                    \ LIMIT 20"
+                    (hid, q, q)
+        render IndexView { entries, hubs, mQuery = Just q }