perf: optimize c ws stmt2

[qevolg]

Description

Optimize c ws stmt2

Jira: https://jira.taosdata.com:18080/browse/TD-34259

Checklist

Please check the items in the checklist if applicable.

• Is the user manual updated?
• Are the test cases passed and automated?
• Is there no significant decrease in test coverage?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 95.85799% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.62%. Comparing base (0e47990) to head (29d435e).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
taos-ws-sys/src/ws/stmt2.rs	96.03%	13 Missing ⚠️
taos-ws/src/stmt2/mod.rs	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #504      +/-   ##
==========================================
- Coverage   82.64%   82.62%   -0.02%     
==========================================
  Files         117      117              
  Lines       56734    56930     +196     
==========================================
+ Hits        46886    47040     +154     
- Misses       9848     9890      +42     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Copilot]

Pull Request Overview

This PR optimizes the C WebSocket statement 2 (stmt2) implementation by replacing high-level parameter binding with direct byte serialization for better performance.

• Replaces high-level Value and ColumnView based parameter binding with direct byte serialization
• Introduces manual binary protocol encoding to avoid object allocation overhead
• Adds new public APIs for direct byte binding and statement ID access

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 3 comments.

File	Description
taos-ws/src/stmt2/mod.rs	Renames internal method and exposes new public APIs for byte binding and statement ID access
taos-ws-sys/src/ws/stmt2.rs	Major refactor replacing parameter conversion with direct byte serialization and binary protocol encoding
taos-ws-sys/Cargo.toml	Adds byteorder dependency for binary data encoding
taos-query/src/stmt/mod.rs	Consolidates imports for cleaner module organization

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}