refs #739: document DB-owned task and few-shot policy

database/adb/138_sgmp_tighten_fewshot_neighbor_margin.sql

@@ -0,0 +1,11 @@
+-- Calibrate the semantic-neighbour window using reviewed CZN patterns:
+-- retain close paraphrases, exclude adjacent metric shapes.
+UPDATE sg_game_scope_policy
+   SET number_value = 0.100000,
+       description = 'Maximum additional cosine distance from the best runtime Few-shot candidate.',
+       active_yn = 'Y',
+       updated_at = SYSTIMESTAMP
+ WHERE policy_key = 'QA_VECTOR_NEIGHBOR_DISTANCE_MARGIN'
+/
+
+COMMIT