Add configurable AI operator persona

migrations/sql/0030_ai_operator_config_postgres.sql

@@ -0,0 +1,12 @@
+CREATE TABLE IF NOT EXISTS ai_operator_settings (
+    id SERIAL PRIMARY KEY,
+    settings_key VARCHAR(64) NOT NULL UNIQUE,
+    config_json TEXT NOT NULL DEFAULT '{}',
+    updated_at VARCHAR(64) NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_ai_operator_settings_key
+ON ai_operator_settings(settings_key);
+
+CREATE INDEX IF NOT EXISTS idx_ai_operator_settings_updated_at
+ON ai_operator_settings(updated_at);