Add issue investigator agent from Drasi repo

[nicolejms]

Description

Adding an agent file used by the Drasi team to investigate issues and report findings.

Type of change

• This pull request is a minor refactor, code cleanup, test improvement, or other maintenance task and doesn't change the functionality of Radius (issue link optional).

Fixes: none

Contributor checklist

Please verify that the PR meets the following requirements, where applicable:

• An overview of proposed schema changes is included in a linked GitHub issue.
  • Yes
  • Not applicable
• A design document PR is created in the design-notes repository, if new APIs are being introduced.
  • Yes
  • Not applicable
• The design document has been reviewed and approved by Radius maintainers/approvers.
  • Yes
  • Not applicable
• A PR for the samples repository is created, if existing samples are affected by the changes in this PR.
  • Yes
  • Not applicable
• A PR for the documentation repository is created, if the changes in this PR affect the documentation or any user facing updates are made.
  • Yes
  • Not applicable
• A PR for the recipes repository is created, if existing recipes are affected by the changes in this PR.
  • Yes
  • Not applicable

[Copilot]

Pull request overview

Adds a reusable “issue investigator” agent definition under .github/agents/ to guide structured technical investigations of GitHub issues for Radius developers.

Changes:

• Introduces a new agent file: .github/agents/issue-investigator.agent.md
• Defines the agent’s metadata (name/description/tools), expected input, and an investigation/reporting template

[brooke-hamilton]

🚀

[radius-functional-tests]

Radius functional test overview

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Click here to see the test run details

Name	Value
Repository	nicolejms/radius
Commit ref	2133c52
Unique ID	func615a5c0d0c
Image tag	pr-func615a5c0d0c

• gotestsum 1.13.0
• KinD: v0.29.0
• Dapr: 1.14.4
• Azure KeyVault CSI driver: 1.4.2
• Azure Workload identity webhook: 1.3.0
• Bicep recipe location ghcr.io/radius-project/dev/test/testrecipes/test-bicep-recipes/<name>:pr-func615a5c0d0c
• Terraform recipe location http://tf-module-server.radius-test-tf-module-server.svc.cluster.local/<name>.zip (in cluster)
• applications-rp test image location: ghcr.io/radius-project/dev/applications-rp:pr-func615a5c0d0c
• dynamic-rp test image location: ghcr.io/radius-project/dev/dynamic-rp:pr-func615a5c0d0c
• controller test image location: ghcr.io/radius-project/dev/controller:pr-func615a5c0d0c
• ucp test image location: ghcr.io/radius-project/dev/ucpd:pr-func615a5c0d0c
• deployment-engine test image location: ghcr.io/radius-project/deployment-engine:latest

Test Status

⌛ Building Radius and pushing container images for functional tests...
✅ Container images build succeeded
⌛ Publishing Bicep Recipes for functional tests...
❌ Test recipe publishing failed

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.98%. Comparing base (9d115e2) to head (0f5150e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11221      +/-   ##
==========================================
- Coverage   51.00%   50.98%   -0.02%     
==========================================
  Files         679      679              
  Lines       43174    43174              
==========================================
- Hits        22019    22012       -7     
- Misses      19035    19040       +5     
- Partials     2120     2122       +2     

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