refactor(testing, db): enhance testing utilities, database connections, and documentation

[pcfreak30]

• Introduced new testing utilities for database operations
• Implemented database connection providers for MySQL and SQLite
• Adjusted logging for better error tracking and debugging
• Added GoDocs for improved documentation of testing and database utilities

Summary by CodeRabbit

• New Features
  • Introduced enhanced database connectivity options for MySQL and SQLite, improving overall connection reliability.
• Refactor
  • Adopted a provider-based architecture for database interactions and revamped the logging system for more structured output.
• Tests
  • Added comprehensive testing utilities and new test cases to simulate database operations and validate dynamic service setup.
• Documentation
  • Expanded inline documentation to better explain caching and database procedures.
• Chores
  • Upgraded dependency management with an updated SQL mocking library.

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Latest commit: 53e35b0

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[coderabbitai]

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Walkthrough

This pull request refactors database connection logic and enhances testing capabilities. It introduces a provider‐based architecture for database connections (supporting MySQL and SQLite) along with retry logic for lock errors. New testing utilities allow SQL mock creation via dedicated functions and a mock provider. Test context functionality has been extended with service registration and cleanup support. In addition, the logging mechanism was overhauled with a new structured logger and documentation in caching modules has been improved. A new dependency for sqlmock was also added.

Changes

File(s)	Change Summary
core/testing/db/{db.go, mock_provider.go}, core/testing/{example_test.go, testing.go}	Added SQL mock utilities and a MockProvider for testing database interactions; introduced new test functions and extended TestContext with service registration and cleanup methods.
db/{db.go, mysql_provider.go, provider.go, sqlite_provider.go}	Refactored database connection logic to use a provider-based design; added retry functions (RetryOnLock, RetryableTransaction) and migration helper; introduced provider implementations for MySQL and SQLite along with a unified Provider interface.
db/logger.go	Replaced the old logger with a new DBLogger implementation that uses zap for structured logging; updated method signatures and added clarifying comments.
db/{cache_memory.go, cache_redis.go}	Enhanced inline documentation and comments in the in-memory and Redis caching implementations to clarify functionality and design.
go.mod	Added the dependency github.com/DATA-DOG/go-sqlmock v1.5.2 for SQL mocking in tests.

Sequence Diagram(s)

sequenceDiagram
    participant T as Test
    participant SM as SetupSQLMock
    participant NS as NewSQLMock
    participant MP as NewMockProvider
    participant DB as GORM DB

    T->>SM: Call SetupSQLMock(t)
    SM->>NS: Call NewSQLMock(t)
    NS->>MP: Initialize MockProvider
    MP->>DB: Create & configure mock DB connection
    NS->>T: Return (DB, sqlmock)
    SM->>T: Return (TestContext with DB, sqlmock)

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sequenceDiagram
    participant App as Application
    participant DBM as DB Module
    participant Prov as Provider (MySQL/SQLite)
    participant Log as DBLogger 

    App->>DBM: Call NewDatabase(ctx)
    DBM->>Prov: Invoke Connect(logger)
    Prov->>Log: Initialize structured logging (NewLogger)
    Prov->>Prov: Establish connection & setup dialector
    Prov->>DBM: Return GORM DB instance & options
    DBM->>App: Complete database setup

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Poem

I'm a little rabbit, hopping through the code,
With mocks and tests that lighten heavy load.
Providers join in, connecting databases anew,
Logs that sparkle, structured with a zap or two.
In our code garden, each bug gets swiftly outwitted—
A joyful hop of progress, in every line committed!

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📜 Recent review details

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📥 Commits

Reviewing files that changed from the base of the PR and between fe705e4 and 53e35b0.

⛔ Files ignored due to path filters (1)

• go.sum is excluded by !**/*.sum

📒 Files selected for processing (12)

• core/testing/db/db.go (1 hunks)
• core/testing/db/mock_provider.go (1 hunks)
• core/testing/example_test.go (3 hunks)
• core/testing/testing.go (5 hunks)
• db/cache_memory.go (4 hunks)
• db/cache_redis.go (4 hunks)
• db/db.go (7 hunks)
• db/logger.go (5 hunks)
• db/mysql_provider.go (1 hunks)
• db/provider.go (1 hunks)
• db/sqlite_provider.go (1 hunks)
• go.mod (1 hunks)

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