Investigate and optimize all backend API routes - Reg2

[dleard]

Investigate and optimize API endpoints in Reg2. (You can use optimization techniques in the optimization.md file).

Add critical ones below:

• "/v2/operations/{uuid:operation_id}/registration/operation", (register_edit_operation_information)

Spreadsheet with profiling results:

Endpoint profiling.ods

Not included are:

• @router.put("/user-operators/{uuid:user_operator_id}", (I couldn't find this being used anywhere)
• @router.get("/users/{user_id}", (also not used)
• @router.get("/user-operators/current/is-current-user-approved-admin", (used in the middleware and I was having trouble getting silk to pick it up)
• any new endpoints created after 2025-02-02

I broke this into three tickets that cover the slowest of the endpoints:

• Optimize user-operators endpoints #2787
• Optimize operators endpoints #2786
• Optimize operations endpoints #2781

[Dianadec]

placeholder card that should probably be split up. cc @dleard

[nanyangpro]

Re: Refinement discussion - This one is more like an epic. Once we have individual tickets identified, this one will be gone.

[dleard]

This can be better defined once #952 and #1061 are complete. Having our API structure split up first will make it easier to write individual cards for each endpoint.

[nanyangpro]

This will be refined. @andrea-williams

[patriciarussellCAS]

Flagging that we'll need a similar ticket for Reporting.
cc: @pbastia

[patriciarussellCAS]

Do in parallel with #2539