MM-45120: Track team join times. Add API to retrieve new team members since a given time. (#20708)

* MM-45120: Starts tracking team join time. Adds API to retrieve team members who joined after a given time.

* MM-45120: Updates json casing to match model.User.

db/migrations/migrations.list

@@ -182,6 +182,8 @@ db/migrations/mysql/000090_create_enums.down.sql
 db/migrations/mysql/000090_create_enums.up.sql
 db/migrations/mysql/000091_create_post_reminder.down.sql
 db/migrations/mysql/000091_create_post_reminder.up.sql
+db/migrations/mysql/000092_add_createat_to_teammembers.down.sql
+db/migrations/mysql/000092_add_createat_to_teammembers.up.sql
 db/migrations/postgres/000001_create_teams.down.sql
 db/migrations/postgres/000001_create_teams.up.sql
 db/migrations/postgres/000002_create_team_members.down.sql
@@ -364,3 +366,5 @@ db/migrations/postgres/000090_create_enums.down.sql
 db/migrations/postgres/000090_create_enums.up.sql
 db/migrations/postgres/000091_create_post_reminder.down.sql
 db/migrations/postgres/000091_create_post_reminder.up.sql
+db/migrations/postgres/000092_add_createat_to_teamembers.down.sql
+db/migrations/postgres/000092_add_createat_to_teamembers.up.sql

db/migrations/mysql/000092_add_createat_to_teammembers.down.sql

@@ -0,0 +1,14 @@
+SET @preparedStatement = (SELECT IF(
+    EXISTS(
+        SELECT 1 FROM INFORMATION_SCHEMA.STATISTICS
+        WHERE table_name = 'TeamMembers'
+        AND table_schema = DATABASE()
+        AND column_name = 'CreateAt'
+    ) > 0,
+    'ALTER TABLE Reactions DROP COLUMN CreateAt;',
+    'SELECT 1;'
+));
+
+PREPARE removeColumnIfExists FROM @preparedStatement;
+EXECUTE removeColumnIfExists;
+DEALLOCATE PREPARE removeColumnIfExists;

db/migrations/mysql/000092_add_createat_to_teammembers.up.sql

@@ -0,0 +1,29 @@
+SET @preparedStatement = (SELECT IF(
+    NOT EXISTS(
+        SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS
+        WHERE table_name = 'TeamMembers'
+        AND table_schema = DATABASE()
+        AND column_name = 'CreateAt'
+    ),
+    'ALTER TABLE TeamMembers ADD COLUMN CreateAt bigint DEFAULT 0;',
+    'SELECT 1;'
+));
+
+PREPARE addColumnIfNotExists FROM @preparedStatement;
+EXECUTE addColumnIfNotExists;
+DEALLOCATE PREPARE addColumnIfNotExists;
+
+SET @preparedStatement = (SELECT IF(
+    (
+        SELECT COUNT(*) FROM INFORMATION_SCHEMA.STATISTICS
+        WHERE table_name = 'TeamMembers'
+        AND table_schema = DATABASE()
+        AND index_name = 'idx_teammembers_create_at'
+    ) > 0,
+    'SELECT 1',
+    'CREATE INDEX idx_teammembers_createat ON TeamMembers(CreateAt);'
+));
+
+PREPARE createIndexIfNotExists FROM @preparedStatement;
+EXECUTE createIndexIfNotExists;
+DEALLOCATE PREPARE createIndexIfNotExists;

db/migrations/postgres/000092_add_createat_to_teamembers.down.sql

@@ -0,0 +1 @@
+ALTER TABLE teammembers DROP COLUMN IF EXISTS createat;

db/migrations/postgres/000092_add_createat_to_teamembers.up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE teammembers ADD COLUMN IF NOT EXISTS createat bigint DEFAULT 0;
+CREATE INDEX IF NOT EXISTS idx_teammembers_createat on teammembers (createat);