V142: Widen role-permission keys for fine-grained sub-permissions.

Sub-permissions are stored in phoenix_kit_role_permissions.module_key as composed dotted keys ("calendar.view_others"). Base and sub parts are each capped at 50 chars, so a composed key can reach 101 — the original V53 VARCHAR(50) is too narrow. Widen to VARCHAR(120).

All statements are idempotent, safe to re-run.