Fix oversized player statistic keys

src/main/java/net/therosegarden/playerstats/SqlStatsStorage.java

@@ -12,6 +12,8 @@ import java.util.Properties;
 import java.util.UUID;
 
 final class SqlStatsStorage implements StatsStorage {
+    private static final int STAT_KEY_LENGTH = 512;
+
     private final String url;
     private final String username;
     private final String password;
@@ -54,7 +56,7 @@ final class SqlStatsStorage implements StatsStorage {
                 CREATE TABLE IF NOT EXISTS rose_player_stats (
                     uuid CHAR(36) NOT NULL,
                     player_name VARCHAR(64) NOT NULL,
-                    stat_key VARCHAR(190) NOT NULL,
+                    stat_key VARCHAR(512) NOT NULL,
                     stat_value BIGINT NOT NULL,
                     PRIMARY KEY (uuid, stat_key),
                     INDEX idx_stats_player_name (player_name),
@@ -75,6 +77,31 @@ final class SqlStatsStorage implements StatsStorage {
                 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
                 """);
         }
+        ensureStatKeyCapacity(db);
+    }
+
+    private void ensureStatKeyCapacity(Connection db) throws SQLException {
+        long currentLength = 0L;
+        try (PreparedStatement statement = db.prepareStatement("""
+            SELECT CHARACTER_MAXIMUM_LENGTH
+            FROM information_schema.COLUMNS
+            WHERE TABLE_SCHEMA = DATABASE()
+              AND TABLE_NAME = 'rose_player_stats'
+              AND COLUMN_NAME = 'stat_key'
+            """)) {
+            try (ResultSet result = statement.executeQuery()) {
+                if (result.next()) {
+                    currentLength = result.getLong(1);
+                }
+            }
+        }
+
+        if (currentLength > 0L && currentLength < STAT_KEY_LENGTH) {
+            try (Statement statement = db.createStatement()) {
+                statement.executeUpdate(
+                    "ALTER TABLE rose_player_stats MODIFY COLUMN stat_key VARCHAR(" + STAT_KEY_LENGTH + ") NOT NULL");
+            }
+        }
     }
 
     @Override