fix(server): rename loop variable to avoid shadowing jac dict in gradient RPCs

[HeaTTap]

Fixes #71

• Renamed for jac, value in jac.items(): loop variable to for key, value in jac.items(): in philote_mdo/general/explicit_server.py and philote_mdo/general/implicit_server.py to prevent variable shadowing of the jac dictionary during gradient RPC streaming.

[chrislupp]

Until further notice, we are no longer accepting contributions from unknown developers. This is not how open source contributions are supposed to work.

[HeaTTap]

Until further notice, we are no longer accepting contributions from unknown developers. This is not how open source contributions are supposed to work.

uh how is it supposed to work, i actually dont know
how do i beome a "known developer"?

[chrislupp]

I closed this PR because:

• it was submitted without any prior discussion,
• it implemented an issue that already documented the diagnosis and solution developed by another contributor,
• it targeted the wrong branch (main instead of develop),
• and it showed no indication that the project's development workflow had been reviewed before submitting code.

We will update our contribution policies soon to address issues like these, but in the mean time we need to restrict contribution to developers known to the maintainers.