PTO should be lockable

[keshavbiswa]

Description

• I can always go and delete my past PTO entries and my leaves will increase which should not be the case.

Environment

What is the expected behaviour?

What is the current behaviour?

How to reproduce the issue?

Screenshots or Screencast

Please provide any traces or logs that could help here.

Any possible solutions?

If the bug is confirmed, would you be willing to submit a PR?

[sonamvg]

PTO editing should be locked for employee roles after the week is over.
Admin can edit the entries as needed.