feat(ccdi-project): harden bank statement dedup import

assets/database/2026-03-10-bank-statement-dedup.sql

@@ -0,0 +1,33 @@
+SET NAMES utf8mb4;
+
+DELETE FROM ccdi_bank_statement
+WHERE project_id IS NULL
+   OR LE_ACCOUNT_NO IS NULL
+   OR ACCOUNTING_DATE_ID IS NULL;
+
+UPDATE ccdi_bank_statement
+SET LE_ACCOUNT_NO = TRIM(LE_ACCOUNT_NO);
+
+DELETE t1
+FROM ccdi_bank_statement t1
+JOIN ccdi_bank_statement t2
+  ON t1.bank_statement_id > t2.bank_statement_id
+ AND t1.project_id = t2.project_id
+ AND t1.LE_ACCOUNT_NO = t2.LE_ACCOUNT_NO
+ AND t1.ACCOUNTING_DATE_ID = t2.ACCOUNTING_DATE_ID
+ AND t1.AMOUNT_DR = t2.AMOUNT_DR
+ AND t1.AMOUNT_CR = t2.AMOUNT_CR;
+
+ALTER TABLE ccdi_bank_statement
+    MODIFY COLUMN project_id bigint(20) NOT NULL COMMENT '关联项目ID',
+    MODIFY COLUMN LE_ACCOUNT_NO varchar(240) NOT NULL DEFAULT '' COMMENT '企业银行账号',
+    MODIFY COLUMN ACCOUNTING_DATE_ID int(11) NOT NULL COMMENT '账号日期ID';
+
+ALTER TABLE ccdi_bank_statement
+    ADD UNIQUE KEY uk_bank_statement_dedup (
+        project_id,
+        LE_ACCOUNT_NO,
+        ACCOUNTING_DATE_ID,
+        AMOUNT_DR,
+        AMOUNT_CR
+    );