[stephahart]

Warn once during command startup when authentication or API endpoint environment variables point to non-default destinations. Show variable names on stderr without exposing URL credentials, and preserve intentional endpoint overrides.

Validation: CGO_ENABLED=0 go test ./pkg/config ./pkg/cmd -run 'TestWarnEndpointOverrides|TestNewDefaultBrevCommandRegistersGlobalOrgFlag' -timeout 3m passed.

Refs https://linear.app/nvidia/issue/BRE2-1285

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.06%. Comparing base (6c85c4e) to head (2258344).
⚠️ Report is 18 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/config/config.go	83.33%	4 Missing ⚠️
pkg/cmd/cmd.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #527      +/-   ##
==========================================
+ Coverage   33.51%   38.06%   +4.54%     
==========================================
  Files         153      136      -17     
  Lines       21654    20123    -1531     
==========================================
+ Hits         7257     7659     +402     
+ Misses      13624    11668    -1956     
- Partials      773      796      +23     

Flag	Coverage Δ
Linux	38.06% <80.00%> (+4.54%)	⬆️

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