Expose CPPSTD configuration

[yhmo]

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[Copilot]

Pull request overview

This PR aims to make the Milvus C++ SDK’s C++ language standard configurable (rather than being hard-coded to C++14), by exposing the setting through CMake and the build script, and relaxing Conan’s enforced cppstd pinning.

Changes:

• Expose CMAKE_CXX_STANDARD as an overridable CMake cache variable.
• Add a CPPSTD environment variable to scripts/build.sh and pass it through to CMake.
• Remove Conan recipe configuration that forcibly set compiler.cppstd=14.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
scripts/build.sh	Introduces CPPSTD (default 14) and forwards it to -DCMAKE_CXX_STANDARD (and Conan host settings).
conanfile.py	Removes forced compiler.cppstd=14, leaving only a minimum-standard validation.
CMakeLists.txt	Makes CMAKE_CXX_STANDARD a cache variable so callers can override it.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.71%. Comparing base (a0592aa) to head (b608a72).
⚠️ Report is 107 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #505       +/-   ##
===========================================
+ Coverage   53.47%   77.71%   +24.23%     
===========================================
  Files          52      304      +252     
  Lines        4432    13654     +9222     
  Branches        0     1325     +1325     
===========================================
+ Hits         2370    10611     +8241     
- Misses       2062     2934      +872     
- Partials        0      109      +109     

Files with missing lines	Coverage Δ
src/impl/MilvusClientV2Impl.cpp	63.70% <100.00%> (ø)
src/impl/utils/ConnectionHandler.h	83.33% <ø> (ø)

... and 319 files with indirect coverage changes

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.