feat(M04-C): 完成续费换房与订单调整

database/migrations/2026062013_m04c_order_adjustments.down.sql

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+DELETE FROM qipai_schema_migrations WHERE version = '2026062013';
+DROP TABLE IF EXISTS qipai_order_adjustments;
+ALTER TABLE qipai_orders
+  DROP COLUMN operator_note,
+  DROP COLUMN adjustment_amount_cents;
+ALTER TABLE qipai_stores
+  DROP COLUMN cancellation_fee_bps,
+  DROP COLUMN cancellation_cutoff_minutes;

database/migrations/2026062013_m04c_order_adjustments.up.sql

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+ALTER TABLE qipai_stores
+  ADD COLUMN cancellation_cutoff_minutes INT UNSIGNED NOT NULL DEFAULT 120
+    AFTER notification_url,
+  ADD COLUMN cancellation_fee_bps SMALLINT UNSIGNED NOT NULL DEFAULT 0
+    AFTER cancellation_cutoff_minutes;
+
+ALTER TABLE qipai_orders
+  ADD COLUMN adjustment_amount_cents INT NOT NULL DEFAULT 0 AFTER paid_amount_cents,
+  ADD COLUMN operator_note VARCHAR(512) NOT NULL DEFAULT '' AFTER adjustment_amount_cents;
+
+CREATE TABLE IF NOT EXISTS qipai_order_adjustments (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  tenant_id BIGINT UNSIGNED NOT NULL,
+  order_id BIGINT UNSIGNED NOT NULL,
+  adjustment_type VARCHAR(32) NOT NULL,
+  actor_id BIGINT UNSIGNED NOT NULL,
+  source VARCHAR(32) NOT NULL,
+  trace_id VARCHAR(128) NOT NULL,
+  reason VARCHAR(512) NOT NULL DEFAULT '',
+  before_values JSON NOT NULL,
+  after_values JSON NOT NULL,
+  amount_delta_cents INT NOT NULL DEFAULT 0,
+  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+  CONSTRAINT fk_qipai_order_adjustment_tenant
+    FOREIGN KEY (tenant_id) REFERENCES qipai_tenants(id),
+  CONSTRAINT fk_qipai_order_adjustment_order
+    FOREIGN KEY (order_id) REFERENCES qipai_orders(id),
+  CONSTRAINT fk_qipai_order_adjustment_actor
+    FOREIGN KEY (actor_id) REFERENCES qipai_users(id),
+  UNIQUE KEY uq_qipai_order_adjustment_trace (tenant_id, order_id, trace_id),
+  KEY idx_qipai_order_adjustment_order (tenant_id, order_id, id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+INSERT IGNORE INTO qipai_schema_migrations (version, name)
+VALUES ('2026062013', 'm04c_order_adjustments');

database/migrations/2026062013_m04c_order_adjustments.verify.sql

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+SELECT column_name FROM information_schema.columns
+WHERE table_schema = DATABASE() AND table_name = 'qipai_stores'
+  AND column_name IN ('cancellation_cutoff_minutes', 'cancellation_fee_bps')
+ORDER BY column_name;
+
+SELECT column_name FROM information_schema.columns
+WHERE table_schema = DATABASE() AND table_name = 'qipai_orders'
+  AND column_name IN ('adjustment_amount_cents', 'operator_note')
+ORDER BY column_name;
+
+SELECT table_name FROM information_schema.tables
+WHERE table_schema = DATABASE() AND table_name = 'qipai_order_adjustments';
+
+SELECT index_name FROM information_schema.statistics
+WHERE table_schema = DATABASE() AND table_name = 'qipai_order_adjustments'
+  AND index_name IN ('uq_qipai_order_adjustment_trace', 'idx_qipai_order_adjustment_order')
+GROUP BY index_name ORDER BY index_name;
+
+SELECT version, name FROM qipai_schema_migrations WHERE version = '2026062013';