chore(deps): update python packages to v7 (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
protobuf	6.33.5 → 7.34.1
types-protobuf (changelog)	6.32.1.20251210 → 7.34.1.20260403

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[github-actions]

Test Results

0 files   -     8  0 suites   - 8   0s ⏱️ -25s
0 tests  -   256  0 ✅  -   256  0 💤 ±0  0 ❌ ±0 
0 runs   - 2 008  0 ✅  - 2 008  0 💤 ±0  0 ❌ ±0 

Results for commit c633f0d. ± Comparison against base commit 4e5e622.

♻️ This comment has been updated with latest results.

[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: pyproject.toml

Artifact update for types-protobuf resolved to version 7.34.1.20260408, which is a pending version that has not yet passed the Minimum Release Age threshold.
Renovate was attempting to update to 7.34.1.20260403
This is (likely) not a bug in Renovate, but due to the way your project pins dependencies, _and_ how Renovate calls your package manager to update them.
Until Renovate supports specifying an exact update to your package manager (https://github.com/renovatebot/renovate/issues/41624), it is recommended to directly pin your dependencies (with `rangeStrategy=pin` for apps, or `rangeStrategy=widen` for libraries)
See also: https://docs.renovatebot.com/dependency-pinning/