Fixed

• Folia compatibility — plugin.yml now declares folia-supported: true so EzEconomy loads on Folia servers without being rejected as an unsupported plugin.
• API version format — api-version changed from 26.1.2 to 1.21 in both the main and PAPI module plugin.yml files. Paper build 69 introduced strict Minecraft-version format validation that rejected the old dotted build-number form.
• Java 21 runtime compatibility — The jdk25 Maven profile was setting maven.compiler.release=25, producing class file version 69 that Java 21 JVMs cannot load (UnsupportedClassVersionError). Lowered the release target to 21 (class file version 65) in both the default properties and the profile; the build JDK requirement ([25,)) is unchanged.