Claude 10f075ab7f feat(yarn_client): auth config for YARN REST (none/simple/basic/kerberos)
Add per-Connection authentication so CDH 5 / Kerberos / HTTP Basic
clusters can be queried.

- auth_type: none / simple / basic / kerberos
- auth_user / auth_password for HTTP Basic
- auth_principal / auth_keytab stored for audit/display; actual SPNEGO
  handled by httpx-kerberos using the system Kerberos credential cache
- YarnClientConfig.auth_for_httpx() returns the right httpx.Auth object
- _request passes auth= through to httpx.request alongside verify=

New dependency: httpx-kerberos.

Tests cover none/simple (no auth object), Basic auth header,
Kerberos auth object, missing basic user, invalid auth_type, and
tool-layer config propagation.
2026-06-26 13:57:57 +08:00
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2026-06-25 17:11:45 +08:00
2026-06-25 10:45:05 +08:00
2026-06-24 16:53:47 +08:00
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