test: cover DynamoDB table provisioning schema

[tikhandesanket]

Description

Add test coverage for DynamoDB table provisioning to verify that ensure_table() creates the expected key schema.

Related issue

Fixes #

Changes

• Added a provisioning test using Moto DynamoDB.
• Verified the table uses pk as the HASH/partition key.
• Verified pk is defined as a DynamoDB String (S).
• No production code changes.

Testing

• Tests pass locally
• Ruff checks pass
• Documentation updated, if applicable

Checklist

• My changes are focused and relevant to this pull request.
• I have added or updated tests where appropriate.
• I have reviewed my changes for unrelated modifications.
• I have updated documentation where necessary.

[Kaap10]

Thanks for the contribution, @tikhandesanket! Great to see test coverage added for ensure_table().
The test is clean and correctly validates the table's KeySchema and AttributeDefinitions using Moto.

A couple of minor suggestions:

• Idempotency: ensure_table() is designed to be idempotent (handling ResourceInUseException). Calling ensure_table(config, session) a second time in the test would help verify this contract.
• Convention: Please add from __future__ import annotations at the top of the file to align with the rest of the codebase.

LGTM!

[codeforstartups]

Clean, focused test — verifies ensure_table provisions the pk HASH key schema and attribute definitions via moto. Good provisioning-regression coverage. All 4 checks green. Merging — thanks @tikhandesanket!