chore(deps): update dependency protobuf to v7

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
protobuf	==6.33.5 → ==7.34.0

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Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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[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: haproxy-operator/uv.lock

Command failed: uv lock --upgrade-package protobuf
Using CPython 3.14.3 interpreter at: /opt/containerbase/tools/python/3.14.3/bin/python3
  × No solution found when resolving dependencies:
  ╰─▶ Because only the following versions of grpcio-reflection are available:
          grpcio-reflection<=1.76.0
          grpcio-reflection==1.78.0
          grpcio-reflection==1.78.1
      and grpcio-reflection>=1.76.0,<=1.78.0 depends
      on protobuf>=6.31.1,<7.0.0, we can conclude that
      grpcio-reflection>=1.76.0,<1.78.1 depends on protobuf>=6.31.1,<7.0.0.
      And because grpcio-reflection==1.78.1 was yanked
      (reason: https://github.com/grpc/grpc/issues/41725) and
      haproxy-operator:integration depends on grpcio-reflection>=1.76.0,
      we can conclude that haproxy-operator:integration depends on
      protobuf>=6.31.1,<7.0.0.
      And because haproxy-operator:integration depends on protobuf==7.34.0 and
      your project requires haproxy-operator:integration, we can conclude that
      your project's requirements are unsatisfiable.

      hint: Pre-releases are available for `grpcio-reflection` in the
      requested range (e.g., 1.78.0rc2), but pre-releases weren't enabled
      (try: `--prerelease=allow`)

[github-actions]

Test results for commit c8b4b95

Test coverage for c8b4b95

Name                                       Stmts   Miss Branch BrPart  Cover   Missing
--------------------------------------------------------------------------------------
lib/charms/haproxy/v0/ddos_protection.py     154     51     34      8    64%   157-174, 183-187, 288, 316-318, 323, 326-330, 342-344, 381, 387, 393, 396, 424, 495-498, 510-529
src/charm.py                                  21      0      0      0   100%
src/state.py                                  43      0      0      0   100%
--------------------------------------------------------------------------------------
TOTAL                                        218     51     34      8    73%

Static code analysis report

Run started:2026-03-10 06:41:21.540200+00:00

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 333
  Total lines skipped (#nosec): 0
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):

[github-actions]

Test results for commit c8b4b95

Test coverage for c8b4b95

Name                               Stmts   Miss Branch BrPart  Cover   Missing
------------------------------------------------------------------------------
src/charm.py                          45      9      2      0    77%   65-91, 96-98
src/haproxy_spoe_auth_service.py      44     16      2      0    61%   56-64, 76-82, 93-117
src/state.py                          55     15      6      1    67%   64-66, 79, 125-146
------------------------------------------------------------------------------
TOTAL                                144     40     10      1    68%

Static code analysis report

Run started:2026-03-10 06:37:56.460089

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 409
  Total lines skipped (#nosec): 1
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 1

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):

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