feat: implement Redis and Valkey schedule stores, add SREM method to …

[induwara-yaala]

Description

Adds distributed Redis/Valkey/DynamoDB schedule stores and an EventBridge provider for production-grade recurring and deferred triggers, replacing the single-process in-memory/local-thread setup. Wires the capability into both AWS Terraform stacks (containerized and serverless) with the required IAM, DynamoDB, and EventBridge resources, and syncs docs/skills to match.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update
• CI/CD update
• Other (please describe):

Changes Made

This closes out the scheduling capability with its distributed backends and infrastructure. It adds Redis, Valkey, and DynamoDB implementations of ScheduleStore alongside an EventBridge ScheduleProvider (cron translation, SQS target wiring, idempotent delete, error mapping), so schedules can run on shared infrastructure rather than a single process. It then wires all of this into the containerized and serverless AWS Terraform stacks schedule group, execution role, DynamoDB table, IAM pairs, flag-gated env injection and syncs the affected docs and dev skills so they reflect the shipped feature.

Testing

• Unit tests pass locally
• Integration tests pass locally
• Manual testing completed
• New tests added for changes

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes