Prepare SDK 1.7.1 release

[digaobarbosa]

Description

Prepare SDK 1.7.1 to ship the Action Recognition video work and video search merged since v1.7.0. The unreleased range is #534, #542, #519, #508 and #544.

Bump the shared package version and add the changelog entry. Both roboflow and roboflow-slim read this version. Release as a patch version.

Changelog entries:

• Added: roboflow video upload, video upload-status and video annotate ([ar-api] Add CLI video segment annotation (VID-59) #544); Project.annotate_video_segments ([ar-api] Annotate Action Recognition video segments from Python  #534); media_types / --media-types for video and mixed search ([ar-api] Add explicit video selection to SDK and CLI search (VID-52) #542).
• Changed: JSON usage errors keep the option name (shipped in [ar-api] Add CLI video segment annotation (VID-59) #544); NumPy is no longer capped below 2.4 at runtime (Remove the numpy<2.4 cap from runtime requirements #519).
• The dev-only opencv-python bump (chore(deps-dev): bump opencv-python from 4.8.0.74 to 4.8.1.78 in the pip group across 1 directory #508) is left out because it does not affect users.

Type of change

• Maintenance (release preparation)

How has this change been tested, please provide a testcase or example of how you tested the change?

• Python 3.12: python -m unittest passes 1,229 tests with one expected skip. ruff check, ruff format --check and mypy roboflow pass.
• Built the sdist and wheel for both distributions; twine check passes all four artifacts.
• Installed each wheel into its own clean environment. Installed metadata and roboflow.__version__ both read 1.7.1, and roboflow video --help lists upload-status and annotate.
• Every flag, method and doc anchor named in the changelog was checked against main. The release contents were tested in their own PRs; [ar-api] Add CLI video segment annotation (VID-59) #544 passed 27/27 staging E2E cases.

Will the change affect Universe? If so was this change tested in universe?

No.

Any specific deployment considerations

• After this PR is approved, CI is green, and it is merged, create a GitHub release tagged v1.7.1 at the merge commit. Generate notes since v1.7.0, including the CHANGELOG.md entry.
• Publishing the GitHub release triggers .github/workflows/publish.yml, which publishes roboflow, then roboflow-slim, then the SDK docs. No manual PyPI upload is needed.
• After publication, confirm both PyPI projects show 1.7.1 and the installed CLI exposes roboflow video annotate.
• This PR prepares the release; it does not publish it.

Infrastructure impact

• This change affects infrastructure needs (GPUs, Cloud Function sizing, storage etc.)

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