Sunbird Obsrv Building block 5.3.0 sign-off

[Naveenkumar739]

Hello All,

Please find the Sunbird Obsrv Building block 5.3.0 sign-off here.

Environment: NA
Testing Status: NA
Defects Dashboard: NA

Execution Sheet: NA
Note: There are no QA tickets to verify and the environment is not yet set up hence, we will not be performing any regression.

Scope : Link

Building block sign-off template: Link

cc: @rhwarrier @anandp504 @manjudr @chitranshu-keshav @ashokreddy1208 @PoornimaRajesh