Add AI DEV Node deployment foundation

migrations/003_pass_delivery.sql

@@ -0,0 +1,15 @@
+-- Ported from backend/src/main/resources/db/migration/V3__pass_delivery.sql
+
+CREATE TABLE pass_deliveries (
+    id               BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+    created_at       TIMESTAMP    NOT NULL,
+    updated_at       TIMESTAMP    NOT NULL,
+    visit_request_id BIGINT       NOT NULL,
+    channel          VARCHAR(20),
+    recipient        VARCHAR(120),
+    status           VARCHAR(20)  NOT NULL,
+    attempts         INTEGER      NOT NULL,
+    last_error       VARCHAR(500)
+);
+CREATE INDEX idx_pd_status ON pass_deliveries (status);
+CREATE INDEX idx_pd_visit_request ON pass_deliveries (visit_request_id);