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/Tables/mfr__reports.sql

@@ -0,0 +1,20 @@
+CREATE TABLE [dbo].[mfr__reports] (
+    [Id]                   BIGINT          NOT NULL,
+    [Version]              INT             NOT NULL,
+    [DateOfCreation]       DATETIME        NOT NULL,
+    [URI]                  NVARCHAR (255)  NULL,
+    [DocumentName]         NVARCHAR (255)  NULL,
+    [FileTypeString]       NVARCHAR (255)  NULL,
+    [ReportDefinitionCode] NVARCHAR (255)  NULL,
+    [ServiceObjectId]      BIGINT          NOT NULL,
+    [CanBeDeleted]         BIT             NOT NULL,
+    [InvoiceBalance]       NUMERIC (10, 3) NOT NULL,
+    [InvoiceId]            NVARCHAR (255)  NULL,
+    [DueDate]              DATETIME        NOT NULL,
+    [IsPayed]              BIT             NOT NULL,
+    [IsInvoice]            BIT             NOT NULL,
+    [IsCanceled]           BIT             NOT NULL,
+    [CustomValues]         NVARCHAR (MAX)  NOT NULL,
+    CONSTRAINT [PK_mfr__report] PRIMARY KEY CLUSTERED ([Id] ASC)
+);
+