fix(tag): push local latest tag before bumping

[birdmanmandbir]

Summary

• Make ttal tag --bump reuse the latest local semver tag when origin does not have it yet.
• Let the daemon push an existing local tag instead of failing during local tag creation.
• Avoid deleting pre-existing local tags when a push fails; only roll back tags created by the daemon in that request.

Tests

• go test ./cmd -run TestComputeBumpedTagReturnsLocalLatestWhenMissingFromRemote -count=1
• go test ./internal/daemon -run TestHandleGitTag_PushesExistingLocalTag -count=1
• go test ./cmd -run 'Test.*Tag|TestSemver' -count=1
• go test ./internal/daemon -run 'Test.*GitTag|TestHandleGitTag|TestHTTPGitTag' -count=1
• make test
• make build

Note

• make ci still fails on existing full-repo lint issues outside this diff, including goconst findings in unrelated packages and internal/gitprovider/provider.go:89 unused tailString.