feat(plugins): forward external batch query RPC

[haos666]

Summary

• Override RpcDriver::execute_batch to call an external plugin's execute_query_batch JSON-RPC method when available.
• Preserve graceful compatibility by falling back to the existing sequential execute_query loop when the plugin returns method-not-found.
• Emit existing per-statement progress callbacks for both native plugin batch results and fallback results.

Context

This is the next focused follow-up from #316 after trigger forwarding and Oracle/DM splitter support. It lets external plugins that implement execute_query_batch preserve a single plugin-managed connection/session across multi-statement execution, while older plugins continue using the existing fallback behavior.

Validation

• cargo test plugins::driver --manifest-path src-tauri/Cargo.toml
• corepack pnpm exec vitest run - 147 files / 2767 tests passed
• corepack pnpm run typecheck
• corepack pnpm run lint - passed with the existing SettingsProvider.tsx hook dependency warning
• corepack pnpm run build
• TMPDIR=/tmp corepack pnpm run test:rust - 797 passed / 1 ignored; integration tests remain ignored by default

Note: running corepack pnpm run test:rust without TMPDIR=/tmp failed locally only because the askpass Unix socket path exceeded SUN_LEN in the default macOS temp directory. The same suite passed with a shorter temp dir.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 file)

• src-tauri/src/plugins/driver.rs

Previous Review Summary (commit 4630aa7)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit 4630aa7)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 file)

• src-tauri/src/plugins/driver.rs

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_{Reviewed by kimi-k2.6 · Input: 23.9K · Output: 2.6K · Cached: 77.8K}