feat: add scoped adaptive experience foundation

database/migrations/051_gen2_adaptive_experience_scope.sql

@@ -0,0 +1,16 @@
+BEGIN;
+
+SET ROLE epistemics_role;
+
+ALTER TABLE epistemics.experience_records
+  ADD COLUMN IF NOT EXISTS principal_id TEXT NOT NULL DEFAULT '',
+  ADD COLUMN IF NOT EXISTS context_scope_ref TEXT NOT NULL DEFAULT '',
+  ADD COLUMN IF NOT EXISTS problem_statement TEXT NOT NULL DEFAULT '',
+  ADD COLUMN IF NOT EXISTS applicability_conditions TEXT[] NOT NULL DEFAULT ARRAY[]::TEXT[],
+  ADD COLUMN IF NOT EXISTS why_succeeded_or_failed TEXT NOT NULL DEFAULT '';
+
+CREATE INDEX IF NOT EXISTS experience_records_principal_scope_recorded_idx
+  ON epistemics.experience_records (principal_id, context_scope_ref, recorded_at_unix_millis DESC);
+
+RESET ROLE;
+COMMIT;