DBP-90: 實作真正的排行榜

[pan93412]

• feat: implement ranking
• fix(events): handle PostHog event error
• style: reformat codebase
• ci: add Lint and Check Formatting check

[linear]

DBP-90 實作真正的排行榜

[Copilot]

Pull Request Overview

This PR implements a comprehensive ranking system for the database playground application, allowing users to view rankings based on points earned or questions completed within daily/weekly periods. Additionally, it includes bug fixes for PostHog event error handling, code reformatting, and CI improvements.

• Implements ranking functionality with filtering by points or completed questions, ordering options, and pagination support
• Fixes PostHog event error handling by properly capturing return values from Enqueue calls
• Adds GitHub Actions workflow for linting and formatting checks

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
models/ranking.go	Defines UserScore struct for ranking data
internal/ranking/	Core ranking service implementation with comprehensive test coverage
graph/rank.*	GraphQL schema, resolvers, and integration tests for ranking API
internal/events/	Fixes PostHog event error handling
cmd/backend/	Integrates ranking service into dependency injection
.github/workflows/lint.yml	Adds CI workflow for code quality checks

Comments suppressed due to low confidence (2)

graph/rank_resolver_test.go:1

• The comment indicates expected order based on points (User 1: 200, User 0: 150, User 2: 100, User 3: 50), but the assertions expect User 2 first. This appears to be a copy of the same incorrect comment/assertion mismatch from the unit tests.

package graph

graph/rank_resolver_test.go:1

• Same issue as in the unit tests - the comment indicates ascending order should be User 2 (100), User 0 (150), User 1 (200), but the assertions expect User 3, User 1, User 2.

package graph

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[Copilot]

Pull Request Overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated no new comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 18 out of 19 changed files in this pull request and generated 3 comments.

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