profile drill-down/source-link preservation

migrations/0001_initial.sql

@@ -135,6 +135,7 @@ CREATE TABLE IF NOT EXISTS approved_features (
   type TEXT NOT NULL,
   location TEXT NOT NULL DEFAULT '',
   confidence REAL NOT NULL DEFAULT 1.0,
+  source_refs TEXT NOT NULL DEFAULT '[]',
   created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
 );
 
@@ -145,6 +146,7 @@ CREATE TABLE IF NOT EXISTS approved_evidence (
   type TEXT NOT NULL,
   reference TEXT NOT NULL,
   strength TEXT NOT NULL DEFAULT 'medium',
+  source_refs TEXT NOT NULL DEFAULT '[]',
   created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
 );