test(release): characterize existing release policy

[Prashansa-K]

Summary

Characterizes the existing CLI and config release behavior ahead of the semantic-release migration.

• Pins CLI title-only commit classification behavior.
• Expands config path-selection coverage across additions, deletions, renames, merges, and edge cases.
• Adds temporary-Git integration tests using the real semantic-release dry-run API.
• Covers legacy-to-namespaced migration, active beta continuation, independent beta/stable baselines, and subsequent stable releases.
• Replays representative historical intervals with exact commit ordering and path ownership.
• Characterizes release-note availability and independently diverging CLI/config histories.
• Makes no changes to production release or publishing behavior.

Linked issue

Closes Linear CLI-2359

Checklist

• The PR title follows Conventional Commits (e.g. fix(cli): …).
• Tests added or updated for the change.
• From the repository root, pnpm check:all passes; relevant package tests pass for every touched workspace, and pnpm types:check passes for each touched TypeScript workspace (or workspace declaring it).

[github-actions]

Supabase CLI preview

npx --yes https://pkg.pr.new/supabase/cli/supabase@c04601f3c684bfd5c59fbaa8d1651b058261cf9e

Preview package for commit c04601f.