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/fis_fn_id.sql

@@ -0,0 +1,43 @@
+
+
+
+
+
+
+
+CREATE FUNCTION [dbo].[fis_fn_id] (
+	@table varchar(50)
+)
+RETURNS varchar(50)
+AS
+BEGIN
+  DECLARE @NewAccount varchar(10) = null;
+  SET @table = ISNULL(@table, '');
+
+  IF @table = 'fis_usergroups'
+	BEGIN	
+		  SELECT @NewAccount = [dbo].[ocms_fn_generatePassword] (5,0,1,0);
+		  WHILE EXISTS( SELECT 0 FROM [dbo].[fis_usergroups] WITH (SERIALIZABLE) WHERE [usergroup_id] = @NewAccount)
+			BEGIN
+				SET @NewAccount = [dbo].[ocms_fn_generatePassword] (5,0,1,0);
+			END
+	END
+  ELSE IF @table = 'tmp__fds__invoice_servicerequests'
+	BEGIN	
+		SELECT @NewAccount = [dbo].[ocms_fn_generatePassword] (7,0,1,0);
+		  WHILE EXISTS( SELECT 0 FROM [dbo].[tmp__fds__invoice_servicerequests] WITH (SERIALIZABLE) WHERE [InvRqId] = @NewAccount)
+			BEGIN
+				SET @NewAccount = [dbo].[ocms_fn_generatePassword] (7,0,1,0);
+			END
+	END
+  ELSE IF @table = 'tmp__fds__bankingtransactions'
+	BEGIN	
+		SELECT @NewAccount = [dbo].[ocms_fn_generatePassword] (7,0,1,0);
+		  WHILE EXISTS( SELECT 0 FROM [dbo].[tmp__fds__bankingtransactions] WITH (SERIALIZABLE) WHERE [taID] = @NewAccount)
+			BEGIN
+				SET @NewAccount = [dbo].[ocms_fn_generatePassword] (7,0,1,0);
+			END
+	END
+
+  RETURN ISNULL(@NewAccount, [dbo].[ocms_fn_generatePassword] (10,0,1,0));
+END;