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1. Limit is set with employee_request create/update
2. add validation on declaration approve. Return error if doctor's counter >= limit
3. Doctor should change declaration_limit via personal cabinet (TBD)

Specification

Data structure 

Employee request

Limit of declarations that could be signed by doctor is added to create employee request

Save declaration_limit to parties

...

Global_parameters

set declaration_limit in global_parameters.

default value = 2000

Approve employee request

On creating a Party set party.declaration_limit = prm.global_parameters.declaration_limit

Employees

Declaration limit and declaration count are added to get employees list and get employee details

...

1. if declaration is added to report.declaration - change report.parties.declaration_count. Set declaration_count=declaration_count+1
2. if report.declaration.status is change to terminated or closed - change report.parties.declaration_count. Set declaration_count=declaration_count-1

Approve declaration request

Check doctor's limit