fix(deploy): retry transient MIE manager reads

[Taleef7]

Root cause

The final WebChart-stack deploy failed before authentication or container creation because manager.os.mieweb.org:443 was unreachable. The deploy helper inherited curl's long platform timeout and treated a transient GET transport failure as permanent; state-changing requests and later job polling were not the failing boundary.

Fix

• apply 10-second connect and 30-second overall limits to every manager request
• retry safe GET transport failures up to six times with 20-second spacing
• keep POST and DELETE single-attempt because a lost response may already have changed manager state
• run a no-network regression test in CI
• document recovery and the 2026-07-16 incident

Verification

• bash .github/scripts/mieweb-api-request.test.sh
• bash -n on the new helper/test and CRLF-normalized existing deploy script
• git diff --check

No runtime, dependency, schema, PHI, or Outcome Status behavior changes.