Add Bonanza Produce multi-invoice statement template

- Added multi-invoice template for Bonanza Produce with :multi and :multi-match? flags
- Template uses keywords for statement header to identify multi-invoice format
- Extracts invoice-number, date, customer-identifier (from RETURN line), and total
- Parses 4 invoices from statement PDF 13595522.pdf
- All tests pass (29 assertions, 0 failures, 0 errors)

- Added test: parse-bonanza-produce-statement-13595522
- Updated invoice-template-creator skill: emphasized test-first approach

test/clj/auto_ap/parse/templates_test.clj

@@ -32,3 +32,22 @@
                (str (:customer-identifier result) " " (str/trim (:account-number result)))))
         ;; Total is parsed as string, not number (per current behavior)
         (is (= "23.22" (:total result)))))))
+
+(deftest parse-bonanza-produce-statement-13595522
+  (testing "Should parse Bonanza Produce statement 13595522 with multiple invoices"
+    (let [pdf-file (io/file "dev-resources/13595522.pdf")
+          pdf-text (:out (clojure.java.shell/sh "pdftotext" "-layout" (str pdf-file) "-"))
+          results (sut/parse pdf-text)]
+      (is (some? results) "parse should return results")
+      (is (= 4 (count results)) "Should parse 4 invoices from statement")
+      (doseq [result results]
+        (is (= "Bonanza Produce" (:vendor-code result)))
+        (is (= "600 VISTA WAY" (:customer-identifier result))))
+      (is (= "03876838" (:invoice-number (nth results 0))))
+      (is (= "03877314" (:invoice-number (nth results 1))))
+      (is (= "03878619" (:invoice-number (nth results 2))))
+      (is (= "03879035" (:invoice-number (nth results 3))))
+      (is (= "891.65" (:total (nth results 0))))
+      (is (= "720.33" (:total (nth results 1))))
+      (is (= "853.16" (:total (nth results 2))))
+      (is (= "1066.60" (:total (nth results 3)))))))