fix(vat): fill YGB date in Əlavə 1 (change field to Date)

ygbnintarixi was a Float field, so the YGB date could not be stored.
Change it to Date and map posting_date from the YGB report.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

taxes_az/taxes_az/doctype/declaration_of_value_added_tax/declaration_of_value_added_tax.py

@@ -65,12 +65,11 @@ def populate_vat_tables(year, month):
 	filters = _period_filters(year, month)
 
 	# Əlavə 1 — one row per YGB purchase document.
-	# (ygbnintarixi is a Float field on the declaration, so the date is not
-	#  mapped here — see the note returned to the client.)
 	elave_1 = []
 	for r in (ygb_get_data(filters) or []):
 		elave_1.append({
 			"sətirkodu": r.get("line_code"),
+			"ygbnintarixi": r.get("posting_date"),
 			"ygbninnömrəsi": r.get("ygb"),
 			"ygbüzrəalınmışmalınədvsizdəyərimanatla": r.get("amount_without_vat"),
 			"ygbüzrəalınmışmalınədvməbləğimanatla": r.get("vat_amount"),

taxes_az/taxes_az/doctype/declaration_of_value_added_tax_elave1_cari_hesabat/declaration_of_value_added_tax_elave1_cari_hesabat.json

@@ -22,8 +22,7 @@
   },
   {
    "fieldname": "ygbnintarixi",
-   "fieldtype": "Float",
-   "precision": "2",
+   "fieldtype": "Date",
    "in_list_view": 1,
    "label": "YGB-nin tarixi"
   },