fix: [2.6] Querynode collection meta cache protection

[yhmo]

issue: https://github.com/milvus-io/milvus/issues/45410 pr: https://github.com/milvus-io/milvus/pull/45531

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[INFO] PR Label Summary by Default [FAILED] PR #45531 not merged

• Title: fix: Querynode collection meta cache protection
• Status: OPEN
• Link: https://github.com/milvus-io/milvus/pull/45531

[WARNING] Milestone not set

• PR: #45684
• Title: fix: [2.6] Querynode collection meta cache protection Please set a milestone for better release tracking

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[mergify[bot]]

@yhmo go-sdk check failed, comment rerun go-sdk can trigger the job again.

[codecov[bot]]

Codecov Report

:x: Patch coverage is 76.92308% with 6 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 76.63%. Comparing base (3203119) to head (a28fa2d). :warning: Report is 97 commits behind head on 2.6.

Files with missing lines	Patch %	Lines
internal/util/segcore/collection.go	70.00%	4 Missing and 2 partials :warning:

:x: Your patch check has failed because the patch coverage (76.92%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage. :x: Your project check has failed because the head coverage (76.63%) is below the target coverage (77.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##              2.6   #45684   +/-   ##
=======================================
  Coverage   76.62%   76.63%           
=======================================
  Files        1856     1856           
  Lines      287687   287712   +25     
=======================================
+ Hits       220441   220486   +45     
+ Misses      59914    59883   -31     
- Partials     7332     7343   +11     

Components	Coverage Δ
Client	78.03% <ø> (ø)
Core	83.66% <ø> (ø)
Go	74.66% <76.92%> (+0.01%)	:arrow_up:

Files with missing lines	Coverage Δ
internal/querynodev2/segments/collection.go	86.61% <100.00%> (+0.34%)	:arrow_up:
internal/util/segcore/collection.go	50.96% <70.00%> (+3.90%)	:arrow_up:

... and 34 files with indirect coverage changes

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[mergify[bot]]

@yhmo cpu-e2e job failed, comment /run-cpu-e2e can trigger the job again.

[yhmo]

rerun go-sdk

[yhmo]

/run-cpu-e2e

[yhmo]

/ci-rerun-ut-go

[sre-ci-robot]

[ci-v2-notice] Notice: We are gradually rolling out the new ci-v2 system.

• Legacy CI jobs remain unaffected, you can just ignore ci-v2 if you don't want to run it.
• Additional "ci-v2/*" checkers will run for this PR to ensure the new ci-v2 system is working as expected.
• For tests that exist in both v1 and v2, passing in either system is considered PASS.

To rerun ci-v2 checks, comment with:

• /ci-rerun-code-check // for ci-v2/code-check
• /ci-rerun-build // for ci-v2/build
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