* fix: update axum generated multipart requests to own the Multipart or Body
Notes: &Multipart cannot access fields, as we need mutable access.
* chore: run the updated rust-axum sample
* chore: run the updated rust-axum sample (2)
Notes: Ran
./mvnw clean package || exit
./bin/generate-samples.sh
./bin/configs/*.yaml || exit
./bin/utils/export_docs_generators.sh || exit
* chore: fix inconsistent lifetimes
Notes: Multipart should be owned; normal request remains borrowed
* chore: rerun axum samples
