Respect standard HTTP proxy environment variables

[svarlamov]

Summary

• upgrade the shared ureq transport so git-ai automatically honors ALL_PROXY, HTTPS_PROXY, and HTTP_PROXY, including lowercase variants
• honor NO_PROXY/no_proxy bypass rules while preserving native OS TLS trust and existing non-2xx response handling
• preserve the previous unlimited response-body behavior for large downloads
• add end-to-end TestRepo coverage through git-ai upgrade for proxy routing, proxy bypass, and responses over ureq's 10 MB convenience-method limit

Root cause

The shared HTTP agent used ureq 2.12 without enabling environment proxy discovery, so git-ai's internal HTTP requests connected directly even when standard proxy variables were configured.

Validation

• task build
• task fmt
• task lint
• task test TEST_FILTER=http_proxy
• task test TEST_FILTER=tls_native_certs
• full task test suite (with the locally installed droid binary removed from PATH for the pre-existing agent-detection isolation test)

[svarlamov]

• Respect standard HTTP proxy environment variables #1973 👈 (View in Graphite)
• main

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	cargo/​ureq@​2.12.1 ⏵ 3.3.0	-16

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