Add Fuchs_Database SSDT project (schema source of truth)

Adds the SQL Server Data Tools project for the fuchs_fds database — tables,
table types, functions and stored procedures that the backend calls (e.g.
fds__getInvoice, fds__merge_bankingtransactions, fds__tt__bankingtransactions,
fds__admin_getReportCatalog, fis_* auth). Build/model caches (bin, obj,
*.dbmdl, *.jfm, *.user) are git-ignored.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Fuchs_Database/dbo/Functions/fds__fn_creanupTransactionInfo.sql

@@ -0,0 +1,19 @@
+-- =============================================
+-- Author:		<Author,,Name>
+-- Create date: <Create Date, ,>
+-- Description:	<Description, ,>
+-- =============================================
+CREATE FUNCTION [dbo].[fds__fn_creanupTransactionInfo]
+(
+	@info varchar(255)
+)
+RETURNS varchar(255)
+AS
+BEGIN
+	DECLARE @RET varchar(255);
+
+	SET @RET = REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(@info, 'R ', 'R'), 'Rg', 'R'), '2 0', '20'), CHAR(10),''), CHAR(13), ''), '/', ' ')
+
+	RETURN ISNULL(@RET, '');
+
+END