chore: Replace text-embedding-ada-002 with text-embedding-3-small

[NirajC-Microsoft]

Purpose

Replace text-embedding-ada-002 with text-embedding-3-small

Summary

Migrates BYOCC from text-embedding-ada-002 to text-embedding-3-small to align with supported models and improve long-term maintainability.

Both models default to 1536 dimensions — this is a drop-in replacement with no index schema changes.

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Files Changed

#	File	Change
1	main.bicep	@allowed + default → text-embedding-3-small, version '2' → '1'
2	main_custom.bicep	Same as above
3	main.bicep	@allowed + default → text-embedding-3-small, updated quota comment
4	main.json	defaultValue + allowedValues → text-embedding-3-small, version "2" → "1"
5	main.json	defaultValue + allowedValues → text-embedding-3-small
6	checkquota.sh	Quota key → OpenAI.GlobalStandard.text-embedding-3-small
7	deploy.yml	Quota failure email model name updated
8	01_create_products_search_index.py	Parameterized model_name in get_embeddings_batch(), removed hardcoded model ID
9	02_create_policies_search_index.py	Parameterized model_name in get_embeddings(), removed hardcoded model ID
10	CustomizingAzdParameters.md	Default value updated
11	AzureGPTQuotaSettings.md	Model name reference updated

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Testing Notes

• Search for "text-embedding-ada-002" after changes and does not found it.
• Deployed in multiple ways and performed GP testing successfully:
  • WAF
  • NON-WAF
  • Custom Deployment (ARM)
  • Local deployment (main_custom)
• Verified model and version in AI foundry after each deployent.
• Quota check script → Ran successfully

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

[github-actions]

🎉 This PR is included in version 1.2.5 🎉

The release is available on GitHub release

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