fix: recover azd deployments in restricted environments

[Naveen Krishnan (navintkr)]

Purpose

• Allow operators to override the deterministic five-character resource suffix when a soft-deleted globally unique AI Services name remains reserved.
• Keep knowledge-base setup working when organizational policy blocks local Blob data-plane access by using stable public repository URLs for citations while indexing local PDF content.
• Document both recovery paths in the deployment and maintainer guidance.

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

• A default deployment still uses the deterministic resource suffix when AZURE_SOLUTION_UNIQUE_TEXT is unset.
• Setting AZURE_SOLUTION_UNIQUE_TEXT consistently updates resource names and exported outputs.
• Blob failures other than AuthorizationFailure still fail fast.
• Citation fallback resolves the upstream remote default branch and falls back to main when origin/HEAD is unavailable.

Other Information

Validated with:

• Successful azd provisioning preview and full East US deployment.
• All six post-provision bootstrap steps completed.
• Azure AI Search indexed 32 document chunks.
• Fabric workspace installation completed with 39 items.
• python -m compileall -q infra/scripts.
• JSON parsing of infra/main.parameters.json.
• az bicep build --file infra/main.bicep (existing repository warnings only).
• git diff --check.

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[Copilot]

Pull request overview

This PR adds recovery mechanisms for azd up deployments in restricted environments by (1) allowing operators to override the deterministic 5-character uniqueness suffix used in globally-unique resource names, and (2) keeping knowledge-base indexing functional when Blob data-plane access is blocked by using public repository URLs for citations.

Changes:

• Add a solutionUniqueTextOverride parameter wired from AZURE_SOLUTION_UNIQUE_TEXT and propagate it through naming + outputs.
• Add a Blob upload fallback in setup_knowledge_base that switches citation URLs to raw GitHub URLs when Blob uploads fail with AuthorizationFailure.
• Update deployment documentation and maintainer guidance to describe both recovery paths.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
infra/scripts/foundry/step_knowledge_base.py	Adds AuthorizationFailure fallback to use raw GitHub URLs for citations while indexing local PDF content.
infra/main.parameters.json	Introduces solutionUniqueTextOverride parameter sourced from AZURE_SOLUTION_UNIQUE_TEXT.
infra/main.bicep	Adds override parameter, uses it for suffix computation and passes through to the Foundry module + outputs.
docs/fabric/DeploymentGuideFabricManual.md	Mentions citation-URL fallback behavior in the automated deployment path.
docs/DeploymentGuide.md	Documents the new env var and the Blob-policy citation fallback in overview/results text.
.github/instructions/infra-scripts.instructions.md	Updates maintainer instructions to document the AuthorizationFailure citation fallback behavior.

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[Yamini Dhiman (Yamini1-Microsoft)]

Hello Naveen Krishnan (@navintkr)
We are currently reviewing this PR and will get back to you shortly. Additionally, there are a few comments from the Copilot Reviewer that need to be addressed.