tech-debt: complete migration to ensurePatchloomReadyOrNotify helper in remaining commands (configureMcp, setup, verifyMcp, etc)

[SebTardif]

Duplicated ready-check + upgrade notify + open-settings logic remains in several commands after initial extraction in MPI cycle.

See src/binary/patchloom.ts:ensurePatchloomReadyOrNotify

Commands still using old pattern:

• src/commands/configureMcp.ts
• src/commands/setupWorkspace.ts
• src/commands/verifyMcp.ts
• src/commands/managedInstall.ts
• src/commands/showStatus.ts (?)

Fix by updating them to use the helper (passing appropriate context suffix for messages).