docs: aisearch resiliency recommendations

[ripadrao]

Overview/Summary

AI Search resiliency: Enable AZ support in AI Search by configuring multiple replicas to your search service
AI Search Resiliency: Enable Multi Region deployments for AI Search

Related Issues/Work Items

https://dev.azure.com/CSUSolEng/Accelerator%20-%20AI/_workitems/edit/38367
https://dev.azure.com/CSUSolEng/Accelerator%20-%20AI/_workitems/edit/38366

• Read the Contribution Guide and ensured this PR is compliant with the guide
• Checked for duplicate Pull Requests
• Associated it with relevant GitHub Issues or ADO Work Items (Internal Only)
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Ensured PR tests are passing
• Performed testing and provided evidence (e.g. screenshot of output) for any changes associated to ARG queries
• Updated relevant and associated documentation (e.g. Contribution Guide, Docs etc.)

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (2)

azure-resources/CognitiveServices/AIsearch/recommendations.yaml:11

• The word 'potentialBenefits' is incorrectly placed within the description text and should be removed.

longDescription: | Availability zones are used when adding multiple replicas to your search service. Each replica is assigned to a different zone in the region. If there are more replicas than zones, they are distributed as evenly as possible across the available zones.  potentialBenefits: High Availability

azure-resources/CognitiveServices/AIsearch/kql/b376281d-bfec-4695-8f90-9a44544fdfa4.kql:7

• The use of strcat is redundant when concatenating a single property. It should be replaced with the property itself.

| project recommendationId = "b376281d-bfec-4695-8f90-9a44544fdfa4", name, id, param1 = strcat(properties['replicaCount']) , param2 = strcat(location)

[Rajani-Janaki-Ram]

@ejhenry can you please review this?