[PM 30100][Server] Subscription Discount Database Infrastructure (#6936)

* Implement the detail Subscription Discount Database Infrastructure

* Change string to string list

* fix lint error

* Create all missing database object definition files

* Regenerate EF migrations with Designer files

The previous migrations were missing .Designer.cs files. This commit:
- Removes the incomplete migration files
- Regenerates all three provider migrations (MySQL, Postgres, SQLite) with proper Designer files
- Updates DatabaseContextModelSnapshot.cs for each provider

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

* fix failing database

* Resolve the lint  warnings

* Resolve the database failure

* Fix the build Lint

* resolve the dbops reviews

* Add the default value

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/Sql/dbo/Stored Procedures/SubscriptionDiscount_Create.sql

@@ -0,0 +1,54 @@
+CREATE PROCEDURE [dbo].[SubscriptionDiscount_Create]
+    @Id UNIQUEIDENTIFIER OUTPUT,
+    @StripeCouponId VARCHAR(50),
+    @StripeProductIds NVARCHAR(MAX),
+    @PercentOff DECIMAL(5,2),
+    @AmountOff BIGINT,
+    @Currency VARCHAR(10),
+    @Duration VARCHAR(20),
+    @DurationInMonths INT,
+    @Name NVARCHAR(100),
+    @StartDate DATETIME2(7),
+    @EndDate DATETIME2(7),
+    @AudienceType INT,
+    @CreationDate DATETIME2(7),
+    @RevisionDate DATETIME2(7)
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    INSERT INTO [dbo].[SubscriptionDiscount]
+    (
+        [Id],
+        [StripeCouponId],
+        [StripeProductIds],
+        [PercentOff],
+        [AmountOff],
+        [Currency],
+        [Duration],
+        [DurationInMonths],
+        [Name],
+        [StartDate],
+        [EndDate],
+        [AudienceType],
+        [CreationDate],
+        [RevisionDate]
+    )
+    VALUES
+    (
+        @Id,
+        @StripeCouponId,
+        @StripeProductIds,
+        @PercentOff,
+        @AmountOff,
+        @Currency,
+        @Duration,
+        @DurationInMonths,
+        @Name,
+        @StartDate,
+        @EndDate,
+        @AudienceType,
+        @CreationDate,
+        @RevisionDate
+    )
+END

src/Sql/dbo/Stored Procedures/SubscriptionDiscount_DeleteById.sql

@@ -0,0 +1,12 @@
+CREATE PROCEDURE [dbo].[SubscriptionDiscount_DeleteById]
+    @Id UNIQUEIDENTIFIER
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    DELETE
+    FROM
+        [dbo].[SubscriptionDiscount]
+    WHERE
+        [Id] = @Id
+END

src/Sql/dbo/Stored Procedures/SubscriptionDiscount_ReadActive.sql

@@ -0,0 +1,13 @@
+CREATE PROCEDURE [dbo].[SubscriptionDiscount_ReadActive]
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        *
+    FROM
+        [dbo].[SubscriptionDiscountView]
+    WHERE
+        [StartDate] <= GETUTCDATE()
+        AND [EndDate] >= GETUTCDATE()
+END

src/Sql/dbo/Stored Procedures/SubscriptionDiscount_ReadById.sql

@@ -0,0 +1,13 @@
+CREATE PROCEDURE [dbo].[SubscriptionDiscount_ReadById]
+    @Id UNIQUEIDENTIFIER
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        *
+    FROM
+        [dbo].[SubscriptionDiscountView]
+    WHERE
+        [Id] = @Id
+END

src/Sql/dbo/Stored Procedures/SubscriptionDiscount_ReadByStripeCouponId.sql

@@ -0,0 +1,13 @@
+CREATE PROCEDURE [dbo].[SubscriptionDiscount_ReadByStripeCouponId]
+    @StripeCouponId VARCHAR(50)
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    SELECT
+        *
+    FROM
+        [dbo].[SubscriptionDiscountView]
+    WHERE
+        [StripeCouponId] = @StripeCouponId
+END

src/Sql/dbo/Stored Procedures/SubscriptionDiscount_Update.sql

@@ -0,0 +1,38 @@
+CREATE PROCEDURE [dbo].[SubscriptionDiscount_Update]
+    @Id UNIQUEIDENTIFIER OUTPUT,
+    @StripeCouponId VARCHAR(50),
+    @StripeProductIds NVARCHAR(MAX),
+    @PercentOff DECIMAL(5,2),
+    @AmountOff BIGINT,
+    @Currency VARCHAR(10),
+    @Duration VARCHAR(20),
+    @DurationInMonths INT,
+    @Name NVARCHAR(100),
+    @StartDate DATETIME2(7),
+    @EndDate DATETIME2(7),
+    @AudienceType INT,
+    @CreationDate DATETIME2(7),
+    @RevisionDate DATETIME2(7)
+AS
+BEGIN
+    SET NOCOUNT ON
+
+    UPDATE
+        [dbo].[SubscriptionDiscount]
+    SET
+        [StripeCouponId] = @StripeCouponId,
+        [StripeProductIds] = @StripeProductIds,
+        [PercentOff] = @PercentOff,
+        [AmountOff] = @AmountOff,
+        [Currency] = @Currency,
+        [Duration] = @Duration,
+        [DurationInMonths] = @DurationInMonths,
+        [Name] = @Name,
+        [StartDate] = @StartDate,
+        [EndDate] = @EndDate,
+        [AudienceType] = @AudienceType,
+        [CreationDate] = @CreationDate,
+        [RevisionDate] = @RevisionDate
+    WHERE
+        [Id] = @Id
+END

src/Sql/dbo/Tables/SubscriptionDiscount.sql

@@ -0,0 +1,22 @@
+CREATE TABLE [dbo].[SubscriptionDiscount] (
+    [Id]                    UNIQUEIDENTIFIER NOT NULL,
+    [StripeCouponId]        VARCHAR (50)     NOT NULL,
+    [StripeProductIds]      NVARCHAR (MAX)   NULL,
+    [PercentOff]            DECIMAL (5, 2)   NULL,
+    [AmountOff]             BIGINT           NULL,
+    [Currency]              VARCHAR (10)     NULL,
+    [Duration]              VARCHAR (20)     NOT NULL,
+    [DurationInMonths]      INT              NULL,
+    [Name]                  NVARCHAR (100)   NULL,
+    [StartDate]             DATETIME2 (7)    NOT NULL,
+    [EndDate]               DATETIME2 (7)    NOT NULL,
+    [AudienceType]          INT              NOT NULL CONSTRAINT [DF_SubscriptionDiscount_AudienceType] DEFAULT (0),
+    [CreationDate]          DATETIME2 (7)    NOT NULL,
+    [RevisionDate]          DATETIME2 (7)    NOT NULL,
+    CONSTRAINT [PK_SubscriptionDiscount] PRIMARY KEY CLUSTERED ([Id] ASC),
+    CONSTRAINT [IX_SubscriptionDiscount_StripeCouponId] UNIQUE NONCLUSTERED ([StripeCouponId] ASC)
+);
+
+GO
+CREATE NONCLUSTERED INDEX [IX_SubscriptionDiscount_DateRange]
+    ON [dbo].[SubscriptionDiscount]([StartDate] ASC, [EndDate] ASC);

src/Sql/dbo/Views/SubscriptionDiscountView.sql

@@ -0,0 +1,5 @@
+CREATE VIEW [dbo].[SubscriptionDiscountView]
+AS
+SELECT *
+FROM
+    [dbo].[SubscriptionDiscount]