Store and display driver aliases on name changes

[Copilot]

Track driver name changes across sessions by storing previous names as aliases in a dedicated table. Display the 5 most recent aliases in driver profiles and the admin drivers grid.

Changes

Database

• New driver_alias table with driver_id, first_name, last_name, created_at
• Foreign key to driver table with cascade delete
• Indexed on driver_id and created_at DESC for efficient queries
• Migrations for both PostgreSQL and SQLite

Backend

• DriverAlias entity and MyBatis mapper for CRUD operations
• DriverAliasService to fetch latest N aliases and insert new ones
• Modified DriverService.upsertDriver() to detect name changes and persist old name as alias before updating

public void upsertDriver(Driver driver) {
    Driver existingDriver = driverMapper.findById(driver.getId());
    
    if (existingDriver != null) {
        boolean nameChanged = !Objects.equals(existingDriver.getFirstName(), driver.getFirstName()) 
                           || !Objects.equals(existingDriver.getLastName(), driver.getLastName());
        
        if (nameChanged) {
            // Store old name as alias before update
            driverAliasService.insertAlias(
                DriverAlias.builder()
                    .driverId(existingDriver.getId())
                    .firstName(existingDriver.getFirstName())
                    .lastName(existingDriver.getLastName())
                    .createdAt(Instant.now())
                    .build()
            );
        }
    }
    
    driverMapper.upsert(driver);
}

UI

• LeaderboardDriverDetailView: Added "Known Aliases" section displaying up to 5 aliases as badges
• LeaderboardDriversView: Added "Known Aliases" column to grid showing up to 5 aliases per driver as inline badges
• Empty when no aliases exist (no visual clutter)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Store and display driver aliases</issue_title>
<issue_description>Instead of displaying only the last known driver alias, we want to store a driver alias into a dedicated database table called driver_alias when the first name or last name is different from the previous name based on the steam id during session import. We then want to display the lastest 5 driver aliases in the driver profile and in the leaderboard drivers view grid.
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Store and display driver aliases #251

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