kjh2064
945d318c73
Slice A1: Enable DevelopmentHeaderAuthenticationHandler for Gate 3 testing
- Add appsettings.Development.json with Authentication.Mode=DevelopmentHeader
- Enables X-KArtSell-User and X-KArtSell-Role header-based auth in Debug mode
- Satisfies CLAUDE.md Step 3: Host restart required to apply changes
- Resolves Issue #2: Authentication Provider Not Configured (dev-only)
Source: CLAUDE.md §Current Implementation Status §Known Issues #2
Decision: Split auth config by environment (FailClosed/Production, DevelopmentHeader/Debug)
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>