Re-evaluate stale runtime model switching patch carried by dev and fix/36 branches

[dzianisv]

Summary

Local branches dev and fix/36-azure-reasoning-effort-alias still carry the same extra patch that is not represented by current origin/main. The commit subject on both branches is:

• Fix runtime model switching and normalize Copilot Claude tool wrappers

Evidence

• git cherry -v origin/main dev shows a unique + 6cae2aca2 ... Fix runtime model switching and normalize Copilot Claude tool wrappers
• git cherry -v origin/main fix/36-azure-reasoning-effort-alias shows a unique + ec5be6b44 ... Fix runtime model switching and normalize Copilot Claude tool wrappers
• The two commits share the same patch content but different SHAs
• PR Consolidate model switching fixes and CI staging on dev #38 was merged and PR Fix reasoning selection for Azure model aliases #37 was closed, but this specific residual patch is still present locally and not tracked by an open PR

Why this matters

These branches are not safe to delete yet, but they are also not ready to merge as-is because the patch is stale and has not been revalidated on current main.

Acceptance criteria

• Decide whether the residual patch is still needed on top of current main
• If needed, port it to a fresh branch and validate it against current runtime model switching behavior
• If not needed, explicitly retire the stale local branches

[dzianisv]

Retired the redundant local branch fix/36-azure-reasoning-effort-alias.

Reason:

• issue Support reasoning-level selection for provider aliases like azure/gpt-5.4-pro in /model #36 itself is already covered on main
• the only remaining unique patch on that branch was Fix runtime model switching and normalize Copilot Claude tool wrappers
• that exact residual patch is still preserved on local branch dev (same stable patch-id ea343d99bb3bc55b4b2c7e9880888acfb46e42e2)

Follow-up is therefore reduced to deciding whether the residual patch on dev is still needed on top of current main.

[dzianisv]

Retired the last redundant stale local branch dev.

Current situation:

• no clean stale feature branches remain locally
• the residual runtime-switching patch is still referenced by commit SHA in this issue (6cae2aca2ed69214964818b57ee822c84c27c0cf) if it ever needs to be reconsidered
• the only remaining non-main local branch is rebase/dev-rebase-upstream-main-20260325, which is intentionally being kept because it owns a dirty worktree with uncommitted changes and deleting it would discard local work