[16.0][IMP] kmitl_project: add approval phase before project execution

[n3n]

Summary

• Add separate approval_state field (draft → submitted → approved/rejected) to gate project execution lifecycle
• Auto-transitions state from draft → new upon approval; rejection wizard requires a reason with chatter notification
• Phase-aware dual status bars: shows approval statusbar during draft, execution statusbar after approval
• Computed button visibility with Manager-only approve/reject permissions
• Includes post_init_hook to set existing non-draft projects as approved, and fixes missing exception wizard XML in manifest

Test plan

• Create new project → verify approval_state=draft, "Submit for Approval" button visible
• Submit for approval → verify approval_state=submitted, fields become readonly
• As Manager, approve → verify approval_state=approved and state=new auto-transition
• Test reject flow: submit → reject with reason → verify banner + chatter message → reset → resubmit
• Verify exception rules still fire on submit (strategic project missing strategies)
• Upgrade module with existing data → verify non-draft projects get approval_state=approved