Remove pipeline variables section from azure.yaml and update to azd 1.17.0+

[Copilot]

This PR modernizes the Azure Developer CLI configuration by removing the deprecated pipeline: variables: section from azure.yaml, which is no longer needed as of azd version 1.17.0.

Changes Made

• Removed entire pipeline: block containing the following variables:

  • AZURE_OPENAI_RESOURCE
  • AZURE_OPENAI_RESOURCE_LOCATION
  • AZURE_OPENAI_RESOURCE_GROUP
  • AZURE_OPENAI_SKU_NAME
  • ALLOWED_ORIGINS

• Added requiredVersions section to enforce minimum azd version:

  requiredVersions:
    azd: ">= 1.17.0"

• Bumped template version from 0.0.1-beta to 0.1.0-beta to indicate the change

Rationale

With azd 1.17.0+, the Azure Developer CLI automatically detects required variables from main.parameters.json, eliminating the need for manual variable declarations in the pipeline section. All removed variables are confirmed to be present in infra/main.parameters.json and will be auto-detected.

This change:

• Simplifies configuration by removing duplication
• Reduces risk of drift between pipeline variables and actual parameter usage
• Aligns with current Azure Developer CLI best practices
• Maintains full compatibility with existing CI/CD workflows

All tests pass and YAML syntax validation confirms the configuration is valid.

Fixes #90.

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