MOD-14661 Disable SVS bounds checking

[meiravgri]

Disable SVS bounds checking (SVS_EXPERIMENTAL_CHECK_BOUNDS=OFF) when building deps/ScalableVectorSearch from source (non-SVS_SHARED_LIB path).

This addresses a race condition where indexLabelCount() is called concurrently with background indexing in tiered SVS, triggering an exception from SVS's translation table bounds check. Disabling the bounds check avoids the crash until the SVS submodule is bumped to a version that includes the upstream fix (intel/ScalableVectorSearch#301).

Which issues this PR fixes

1. MOD-14661 - Bump deps/svs version and compile with SVS_EXPERIMENTAL_CHECK_BOUNDS=OFF
2. Related to MOD-14618 - Race condition in tiered SVS: indexLabelCount() called without locks causes crash

Main objects this PR modified

1. cmake/svs.cmake - Added set(SVS_EXPERIMENTAL_CHECK_BOUNDS OFF CACHE BOOL "..." FORCE) before add_subdirectory for the in-tree SVS build

Mark if applicable

• This PR introduces API changes
• This PR introduces serialization changes

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Note

Medium Risk
Build-time change that alters SVS runtime validation behavior and could mask out-of-bounds bugs when using the in-tree SVS build. Scope is limited to the non-SVS_SHARED_LIB path in cmake/svs.cmake.

Overview
Disables SVS bounds checks in the vendored build. When SVS_SHARED_LIB is off (building deps/ScalableVectorSearch from source), the CMake now forces SVS_EXPERIMENTAL_CHECK_BOUNDS=OFF via cache before add_subdirectory, changing SVS compilation defaults for that dependency.

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[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.98%. Comparing base (42fdc90) to head (1057155).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #924   +/-   ##
=======================================
  Coverage   96.98%   96.98%           
=======================================
  Files         129      129           
  Lines        7574     7574           
=======================================
  Hits         7346     7346           
  Misses        228      228           

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