[DX-4090] allow to cut off latest tags by ceiling version

[Tofel]

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[Copilot]

Pull request overview

Adds support for limiting the automatically selected SemVer tag upgrade/rollback sequence by an optional “ceiling” version, primarily for the compat CLI flow.

Changes:

• Extend FilterSemverTags / FindSemVerRefSequence to accept an optional tagVersionCeiling and filter out tags above it.
• Add CLI flag plumbing intended to pass the ceiling value into the upgrade-sequence selection.
• Add unit tests covering ceiling behavior, and a changeset entry documenting the feature.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
framework/compat.go	Adds ceiling-based filtering to SemVer tag selection and threads the new parameter through helpers.
framework/compat_test.go	Adds test cases to validate the ceiling behavior (including with include/exclude).
framework/cmd/main.go	Introduces a new CLI flag intended to supply the ceiling version for automatic tag selection.
framework/.changeset/v0.15.21.md	Documents the new optional ceiling feature for the compat command.

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