Emit latest flag from bakery ci matrix - #770
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Add a `latest` boolean to each `bakery ci matrix` entry, alongside the existing `dev` field, so CI workflows can gate per-version steps on whether a version is the latest release of its image. Without it, a workflow whose matrix has already pinned one version has no way to express "only act on the latest one" except by passing --latest to the pinned command. Those two filters intersect to nothing on every non-latest version, which bakery reports as an error rather than as the intentional no-op the caller meant. The value comes from ImageVersion.is_latest_release, which is also what the --latest filter calls via matches_latest_filter. A workflow gating on the field and a command using the filter always select the same versions; there is no second copy of the rule that could drift. is_latest_release is a plain property rather than a computed_field: ImageVersion is round-tripped into bakery.yaml via model_dump, and a computed field would write a derived key into the user's config.
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Add a
latestboolean to eachbakery ci matrixentry alongside the existingdevfield. CI workflows that need to act only on the latest version of each image can gate onmatrix.img.latestrather than passing--latestto a command already pinned to one version by the matrix — those two filters intersect to nothing on every non-latest version.The value comes from
ImageVersion.is_latest_release, a new plain property thatgenerate_image_targetsalso calls viamatches_latest_filter. The field and the filter share one predicate; they cannot drift.Closes #769