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/fuchs_planner_traffic.sql

@@ -0,0 +1,21 @@
+CREATE TABLE [dbo].[fuchs_planner_traffic] (
+    [uid]           BIGINT          IDENTITY (1, 1) NOT NULL,
+    [planner_id]    TINYINT         NOT NULL,
+    [sessionid]     VARCHAR (10)    NOT NULL,
+    [group_code]    VARCHAR (10)    NULL,
+    [values]        NVARCHAR (4000) NULL,
+    [DateSubmitted] DATETIME        CONSTRAINT [DF_fuchs_planner_traffic_DateSubmitted] DEFAULT (getutcdate()) NOT NULL,
+    CONSTRAINT [PK_fuchs_planner_traffic] PRIMARY KEY CLUSTERED ([uid] ASC)
+);
+
+
+GO
+CREATE NONCLUSTERED INDEX [fuchs_planner_traffic__ix2]
+    ON [dbo].[fuchs_planner_traffic]([planner_id] ASC, [sessionid] ASC)
+    INCLUDE([group_code], [DateSubmitted]);
+
+
+GO
+CREATE NONCLUSTERED INDEX [fuchs_planner_traffic__ix1]
+    ON [dbo].[fuchs_planner_traffic]([sessionid] ASC);
+