Unblock protected SRE scenario lab deployment

[dotnetpower]

Context

The exact scenario commit 4b33b50 and current HEAD central fast gates fail on one operational-evidence type error, three unreviewed lexical semantic paths, and reader-facing terminology.

Scope

Scope is strictly limited to those gate repairs and rerunning exact committed validation.

Exit criteria

• Focused mypy passing
• Chat-semantic-routing passing with reviewed baseline dispositions
• Display-terminology and translation gates passing
• Scenario-lab Terraform/Trivy/Checkov/focused tests remaining green
• Exact committed central validation passing
• Exact commit pushed with required CI green
• Protected scenario-lab plan reviewed with no unexpected delete/replace
• Issue evidence comment retained