Add client version to GRPC headers

[dirkkul]

No description provided.

[orca-security-eu]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca

[Copilot]

Pull request overview

Adds the Python client version identifier to outgoing gRPC metadata so Weaviate can observe client identity/version consistently across REST and gRPC calls.

Changes:

• Include x-weaviate-client in gRPC metadata prepared by weaviate/connect/v4.py.
• Add a mock gRPC servicer + fixture to capture invocation metadata in tests.
• Add a test asserting the x-weaviate-client metadata value matches the expected client version string.

Reviewed changes

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

File	Description
weaviate/connect/v4.py	Adds x-weaviate-client to gRPC metadata generation.
mock_tests/conftest.py	Introduces a mock gRPC service + fixture to capture request metadata.
mock_tests/test_collection.py	Adds an assertion that gRPC calls include the expected client version header.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.88%. Comparing base (1b1e069) to head (55e56f0).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1980      +/-   ##
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- Coverage   87.88%   87.88%   -0.01%     
==========================================
  Files         280      280              
  Lines       21463    21482      +19     
==========================================
+ Hits        18863    18879      +16     
- Misses       2600     2603       +3     

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