feat: add change password endpoint using old password;

feat: implement change password service method with validation;
fix: correct ErrorIsOneOf function logic to return true on match;
refactor: rename 'log_out_accounts' to 'log_out_sessions' for clarity;
refactor: update session termination to return GUIDs and cache in Redis;
fix: ensure RollbackOnError only rolls back uncommitted transactions;
fix: handle transaction commit errors properly in dbHelper;
refactor: add helper methods for session termination and registration;
refactor: pass client info to login and registration complete methods;
fix: improve token validation error handling in refresh endpoint;
refactor: update auth middleware to set session info correctly;
chore: remove unused ClientInfo DTO;
fix: correct password reset complete to use session termination helper;
refactor: adjust database queries for session management;
chore: update SQL schema and queries for sessions;
docs: update swagger docs with new endpoint and model changes

backend/internal/models/auth.go

@@ -72,3 +72,13 @@ type PasswordResetCompleteRequest struct {
 type PasswordResetCompleteResponse struct {
 	Tokens
 }
+
+type ChangePasswordRequest struct {
+	OldPassword 			string  `json:"old_password" binding:"required"`
+	NewPassword				string  `json:"password" binding:"required" validate:"password"`
+	TOTP 							string  `json:"totp"`
+}
+
+type ChangePasswordResponse struct {
+	Tokens
+}