chore: upgrade Azure OpenAI embedding model to text-embedding-3-small

[Ayaz-Microsoft]

Purpose

• ...Upgraded text embedding model to text-embedding-3-small

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information

[Copilot]

Pull request overview

Updates the solution’s default Azure OpenAI embedding model configuration to use text-embedding-3-small, aligning infrastructure parameters and local environment defaults with the newer embedding deployment.

Changes:

• Switched default embedding model/name from text-embedding-ada-002 to text-embedding-3-small and set model version to 1 in infra parameters/templates.
• Updated backend env default and .env.sample to use text-embedding-3-small.
• Minor infra adjustments: safer module output access for MI principal ID, and suppressed a Bicep linter warning for function keys.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
infra/modules/core/ai/cognitiveservices.bicep	Adjusts MI principalId output handling (now uses optional access + fallback).
infra/modules/app/function.bicep	Adds #disable-next-line BCP081 for the functionKeys resource.
infra/main.parameters.json	Updates embedding model/name/version defaults to text-embedding-3-small / 1.
infra/main.json	Regenerated ARM template reflecting updated defaults and safer output access.
infra/main.bicep	Updates embedding model/name/version default params; minor formatting change for tags union.
code/backend/batch/utilities/helpers/env_helper.py	Changes default AZURE_OPENAI_EMBEDDING_MODEL fallback to text-embedding-3-small.
.env.sample	Updates sample embedding model env var to text-embedding-3-small.

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[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated 4 comments.

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[Copilot]

Pull request overview

Copilot reviewed 24 out of 24 changed files in this pull request and generated no new comments.

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