feat: add number of employees for each department

[MaskyS]

1. Added 4 missing departments:
   • Law Library*
   • Adult Probation Department
   • Animal Care and Control Department
   • California Academy of Sciences*

* this is missing in sfg-graph too

2. Added number of employees, manually copied from "Department Totals" rows in SF Salary Ordinance FY25-26 Notes: Some departments actually have their no of employees under other departments, as a division. This means if we ever tally up the employee number across departments, it'll be inaccurate. Maybe should add a new parent_department field?

   • Disability and Aging Services under HSA Human Services

     

   • Entertainment Commission under City Admin aka ADM General Services Agency

     

   • Film Commission under ECN Economic & Workforce Development

     

   • Office of Small Business under ECN Economic & Workforce Development

     

   • Animal Care and Control under City Admin aka ADM General Services Agency

     

[m-atoms]

• This addresses #8 and #10... still weird that it's missing from the municipal code
• Law Library definitely needs to be added but then we'll also need to add the Board of Trustees at the commission level
• Same for Academy of Sciences