Always resolve hostnames. (Fix #1750)

[qyl27]

This PR fixes #1750. It will resolve all the hostnames in the configuration.

We're resolving in bind before, and [servers] are not.

[Copilot]

Pull request overview

This PR addresses #1750 by ensuring server addresses defined via configuration/CLI are parsed using a resolving address parser so ServerInfo#getAddress() no longer returns an unresolved InetAddress when hostnames are used.

Changes:

• Removed the non-resolving AddressUtil.parseAddress and switched call sites to AddressUtil.parseAndResolveAddress.
• Updated config validation and server registration paths to use the resolving parser for both bind and [servers] entries.
• Updated CLI --add-server parsing to use the resolving parser.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 6 comments.

File	Description
proxy/src/main/java/com/velocitypowered/proxy/util/AddressUtil.java	Removes parseAddress, leaving parseAndResolveAddress as the primary parser (and dropping Guava IP parsing).
proxy/src/main/java/com/velocitypowered/proxy/config/VelocityConfiguration.java	Validates bind and [servers] addresses using the resolving parser.
proxy/src/main/java/com/velocitypowered/proxy/VelocityServer.java	Registers config servers using the resolving parser during start/reload.
proxy/src/main/java/com/velocitypowered/proxy/ProxyOptions.java	Parses --add-server values using the resolving parser.

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