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/Stored Procedures/fds__admin_logdebug.sql

@@ -0,0 +1,30 @@
+-- =============================================
+-- Author:		Dr. Stefan Ott
+-- Create date: <Create Date,,>
+-- Description:	<Description,,>
+-- =============================================
+CREATE PROCEDURE [dbo].[fds__admin_logdebug]
+	@CodeReference varchar(255)
+	,@ExceptionMessage varchar(max)
+	,@StackTrace varchar(max)
+	,@Data varchar(MAX)
+AS
+BEGIN
+	SET NOCOUNT ON;
+
+   
+	INSERT INTO [dbo].[fds__debuglog]
+           ([CodeReference]
+           ,[ExceptionMessage]
+           ,[StackTrace]
+           ,[Data]
+           ,[timestamp])
+     VALUES
+           (@CodeReference
+           ,@ExceptionMessage
+           ,@StackTrace
+           ,@Data
+           ,GETUTCDATE());
+
+
+END