Shared Forge platform layer

The sources in this directory are compiled by each standalone Forge build.

• src/main/java contains Java 17, Minecraft-neutral bridges and metrics logic.
• src/forge-common/java contains code that is source-compatible across all supported mappings.
• src/forge-legacy/java connects Forge's legacy global event bus (1.20.1 through 1.21.1).
• Forge 1.21.11 owns only its EventBus 7 wiring under its build root.

The platform does not register blocks, items, menus, packets, or login channels. The mod metadata uses IGNORE_SERVER_VERSION so Forge does not advertise a client requirement. An unmodified vanilla-client handshake is still a per-version release acceptance test; metadata alone is not treated as proof.