Student attendance tracking system

[buzyka]

closes #17

[Copilot]

Pull request overview

This PR implements a student attendance tracking system by integrating with the iSAMS ERP system. The implementation adds synchronization capabilities to fetch student data from iSAMS, store it locally, and keep it updated through scheduled cron jobs.

Key Changes:

• Database schema extensions to store ERP-related student data (iSAMS ID, school ID, year group, divisions)
• iSAMS API client integration with OAuth2 authentication for fetching student and year group division data
• Student synchronization service with intelligent change detection using sync hashes and timestamps
• Scheduled cron job to synchronize student data every 2 hours during weekdays (7am-5pm)

Reviewed changes

Copilot reviewed 27 out of 29 changed files in this pull request and generated 17 comments.

Show a summary per file

File	Description
migrations/000004_add-isams_id-and-school_id-to-visitors.*.sql	Adds iSAMS identifiers and tracking fields to visitors table
migrations/000005_add-year-group-and-division-to-visitor-table.*.sql	Adds year group and division tracking fields to visitors table
internal/isb/entity/visitor.go	Extends Visitor entity with ERP fields and implements sync hash calculation
internal/infrastructure/repository/visitor_sqlite.go	Implements GetAll and AddVisitor methods with ERP field handling
internal/infrastructure/integration/isams/*.go	Implements iSAMS API client with OAuth2 authentication
internal/usecase/synchroniser/isams_sync.go	Implements student synchronization logic with caching and change detection
internal/infrastructure/cron/cron_manager.go	Sets up scheduled sync jobs using gocron
internal/config/config.go	Adds iSAMS configuration parameters and MySQL parseTime flag
internal/domain/*	Defines domain interfaces for ERP client and visitor repository
internal/infrastructure/gocontainer/gocontainer.go	Registers new dependencies in DI container

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