Add function to retrieve company address as JSON and update invoice procedures

- Created a new function `fds__getCompanyAddressJson` to return a company's postal address as a structured JSON object.
- Modified stored procedures `fds__createInvoice`, `fds__setInvoice`, and `fds__prepInvoice` to include a new parameter `@SendToAddressJson` for handling the address data.
- Updated the invoice table and user-defined types to accommodate the new `SendToAddressJson` field.
- Ensured that the address data is properly retrieved and stored in the invoice records.

Fuchs_Database/dbo/Functions/fds__getCompanyAddressJson.sql

@@ -0,0 +1,41 @@
+-- =============================================
+-- Returns the recipient company's postal address as a structured JSON object
+-- ({name, street, postalCode, city, state, country}) for the invoice editor's
+-- structured address dialog (EN 16931 / eRechnung). Mirrors the location
+-- resolution of [fds__getCompanyNameAddress] but keeps the fields separate
+-- instead of composing them into one free-text string. See ADR 0012.
+-- =============================================
+CREATE FUNCTION [dbo].[fds__getCompanyAddressJson]
+(
+	@companyid bigint
+)
+RETURNS nvarchar(max)
+AS
+BEGIN
+	DECLARE @locationid bigint, @name nvarchar(255);
+	DECLARE @street nvarchar(255), @postal nvarchar(255), @city nvarchar(255), @state nvarchar(255), @country varchar(15);
+
+	SELECT TOP(1) @locationid = cy.[Location#ID], @name = cy.[name]
+		FROM [dbo].[mfr__companies] as cy WHERE cy.[id] = @companyid;
+
+	IF @locationid IS NULL
+		SELECT TOP(1) @locationid = l.[ID]
+			FROM [dbo].[mfr__#locations] as l
+			JOIN [dbo].[mfr__companies] as cy ON l.[Property] = 'Company:Location' AND l.[EntityId] = cy.[Id]
+			WHERE cy.[id] = @companyid;
+
+	SELECT TOP(1) @street = loc.[AddressString], @postal = loc.[Postal], @city = loc.[City],
+				  @state = loc.[State], @country = loc.[Country]
+		FROM [dbo].[mfr__#locations] as loc WHERE loc.[id] = @locationid;
+
+	RETURN (
+		SELECT
+			  ISNULL(@name, '')    AS [name]
+			, ISNULL(@street, '')  AS [street]
+			, ISNULL(@postal, '')  AS [postalCode]
+			, ISNULL(@city, '')    AS [city]
+			, ISNULL(@state, '')   AS [state]
+			, ISNULL(@country, '') AS [country]
+		FOR JSON PATH, WITHOUT_ARRAY_WRAPPER
+	);
+END