fix: cache get_program_variants response

[bseverino]

https://redventures.atlassian.net/browse/EDUN-8253

Cache get_program_variants response by product_key, refreshing after 4 hours

Merge checklist:
Check off if complete or not applicable:

• Documentation updated (not only docstrings)
• Fixup commits are squashed away
• Unit tests added/updated
• Manual testing instructions provided
• Noted any: Concerns, dependencies, migration issues, deadlines, tickets

Post-merge:

• Backported to latest and next named releases

[Copilot]

Pull request overview

This pull request adds caching to the get_program_variants method to improve performance by reducing redundant API calls to Commercetools. The cache stores program variant data for approximately 24 hours.

Changes:

• Added a new cache TTL constant (GET_PROGRAM_CACHE_TTL_SECS) set to 23 hours and 59 minutes
• Implemented caching logic in get_program_variants using TieredCache to store and retrieve program variant data
• Updated the test for get_program_variants to verify caching behavior

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
commerce_coordinator/apps/commercetools/constants.py	Added cache TTL constant for program variants caching
commerce_coordinator/apps/commercetools/http_api_client.py	Implemented caching logic in get_program_variants method with cache key generation and storage
commerce_coordinator/apps/commercetools/tests/test_http_api_client.py	Updated test to include cache verification and added tearDown to clear cache between tests

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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Coverage report

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File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
commerce_coordinator/apps/commercetools
constants.py
http_api_client.py					154
commerce_coordinator/apps/commercetools/tests
test_http_api_client.py
Project Total

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

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