[Task] Complete the TARS plugin migration and cut over ownership to shenyu-plugin-store

[Aias00]

Background

TARS plugin and starter snapshots already exist in apache/shenyu-plugin-store through PRs #2 and #3. They are not yet the authoritative implementation:

• the store copy predates recent fixes in apache/shenyu;
• the store TARS POM explicitly skips Surefire tests;
• there is no TARS E2E workflow in the store;
• the implementation still depends on TARS-specific core enums, DTOs, constants, response handling, admin registration, and client modules;
• open bug [BUG] TarsMetaDataHandler dedup comparison is semantically wrong (host vs appName) #6738 must not be lost during the move.

Depends on #7294.

Scope

plugin-store

• Port all TARS changes made in apache/shenyu after plugin-store PR Dev jiangxiaofeng #2, including proxy initialization, empty proxy-list handling, selector/upstream updates, null handling, and resource cleanup fixes.
• Remove the Surefire skip and make the existing plugin/starter tests pass in CI.
• Add regression coverage for [BUG] TarsMetaDataHandler dedup comparison is semantically wrong (host vs appName) #6738 and every post-copy TARS fix.
• Add a TARS E2E environment covering provider startup, client/API registration or explicit metadata registration, selector/rule creation, successful invocation, no-result handling, failure handling, and dynamic metadata/config refresh.
• Add documentation and an example bootstrap that consumes the external starter.

apache/shenyu and client/admin boundaries

• Replace hard-coded PluginEnum.TARS, RpcTypeEnum.TARS, RPC response-writer entries, TARS DTOs/converters, and admin registration dependencies with the external-plugin contract.
• Move or preserve TARS client registration in the authoritative client repository; do not leave duplicate published artifacts.
• Remove TARS plugin/starter/default-bootstrap dependencies, examples, and duplicated integration tests from the main repository only after store parity passes.
• Keep historical upgrade SQL; add a migration/compatibility note for existing TARS plugin data.

Acceptance Criteria

• Store TARS source contains all fixes present on main at cutover time.
• Unit and starter tests run rather than being skipped.
• [BUG] TarsMetaDataHandler dedup comparison is semantically wrong (host vs appName) #6738 has a regression test and is resolved or explicitly carried as a blocker.
• E2E proves registration/metadata, invocation, failure behavior, and hot config refresh.
• A minimal ShenYu bootstrap works with the plugin-store TARS starter.
• Maven publication ownership is switched atomically with no duplicate coordinates.
• Main-repository removal occurs only after the external artifact and E2E are green.

[github-actions]

👋 Hello @yuluo-yx

A new issue has been opened by @Aias00:

• Title: [Task] Complete the TARS plugin migration and cut over ownership to shenyu-plugin-store
• Link: [Task] Complete the TARS plugin migration and cut over ownership to shenyu-plugin-store #7296

Please review when you have time. Thank you! 🙏