chore: Update RBAC Configuration to Reference Role IDs

[Shreyas-Microsoft]

Purpose

Update RBAC Configuration to Reference Role IDs

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

Verify that the following are valid

• ...

Other Information

[Copilot]

Pull request overview

Updates the infrastructure RBAC role assignment configuration to reference built-in role definition GUIDs (role IDs) instead of role display names, across the primary and custom Bicep templates and the generated ARM JSON.

Changes:

• Replaced several roleDefinitionIdOrName values from built-in role names to role definition GUIDs in infra/main.bicep.
• Applied the same role-ID changes to the custom deployment template infra/main_custom.bicep (with one remaining name-based assignment to fix).
• Regenerated infra/main.json to reflect the updated Bicep output (template hash and related emitted content updated accordingly).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
infra/main.bicep	Switches multiple role assignments from role names to role definition GUIDs.
infra/main_custom.bicep	Mirrors the role-ID updates for custom deployments (one role assignment still uses the role name).
infra/main.json	Generated ARM output updated to reflect the Bicep role-ID changes and new template hash.

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