fix(providersv2): make inject_header byte-oriented and fix import dia… #2190

Job	Run time
Resolve PR metadata	8s
build-supervisor / Resolve build plan	4s
build-gateway / Resolve build plan	2s
build-gateway / Rust gateway (amd64) / gateway (amd64)	7m 31s
build-gateway / Rust gateway (arm64) / gateway (arm64)	7m 48s
build-supervisor / Rust sandbox (amd64) / sandbox (amd64)	3m 25s
build-supervisor / Rust sandbox (arm64) / sandbox (arm64)	3m 51s
build-supervisor / Build supervisor (arm64)	1m 22s
build-supervisor / Build supervisor (amd64)	1m 22s
build-supervisor / Merge supervisor manifest	1m 7s
build-gateway / Build gateway (arm64)	1m 30s
build-gateway / Build gateway (amd64)	1m 27s
gpu-e2e	0s
GPU E2E result	0s
build-gateway / Merge gateway manifest	1m 9s
e2e / E2E (python)	6m 56s
e2e / E2E (rust-podman)	7m 47s
e2e / E2E (rust-docker)	6m 51s
e2e / E2E (rust-podman-rootless)	15m 55s
kubernetes-e2e / Kubernetes E2E (Rust smoke)	9m 21s
kubernetes-ha-e2e	-1s
Kubernetes HA E2E result	-1s
Core E2E result	4s
	1h 17m 38s

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