Organise ddl statements into separate files per create table (#251)

web/backend/Database/Database.Migrations/scripts/01-schema/05-UserCredential.sql

@@ -0,0 +1,40 @@
+CREATE TABLE UserCredential -- delete credentials when user account is deleted
+(
+    UserCredentialID UNIQUEIDENTIFIER
+        CONSTRAINT DF_UserCredentialID DEFAULT NEWID(),
+
+    UserAccountID UNIQUEIDENTIFIER NOT NULL,
+
+    CreatedAt DATETIME NOT NULL
+        CONSTRAINT DF_UserCredential_CreatedAt DEFAULT GETDATE(),
+
+    Expiry DATETIME NOT NULL
+        CONSTRAINT DF_UserCredential_Expiry DEFAULT DATEADD(DAY, 90, GETDATE()),
+
+    Hash NVARCHAR(256) NOT NULL,
+    -- uses argon2
+
+    IsRevoked BIT NOT NULL
+        CONSTRAINT DF_UserCredential_IsRevoked DEFAULT 0,
+
+    RevokedAt DATETIME NULL,
+
+    RowVersion ROWVERSION,
+
+    CONSTRAINT PK_UserCredential
+        PRIMARY KEY (UserCredentialID),
+
+    CONSTRAINT FK_UserCredential_UserAccount
+        FOREIGN KEY (UserAccountID)
+            REFERENCES UserAccount (UserAccountID)
+            ON DELETE CASCADE
+);
+
+CREATE
+NONCLUSTERED INDEX IX_UserCredential_UserAccount
+    ON UserCredential(UserAccountID);
+
+CREATE
+NONCLUSTERED INDEX IX_UserCredential_Account_Active
+    ON UserCredential(UserAccountID, IsRevoked, Expiry)
+    INCLUDE (Hash);