feat: add contributors stats endpoints for team and individual performance

feat: add recentActivity feed to review snapshot from task history

feat: add GET /boards/:boardId/tasks/archived endpoint with 20 latest archived tasks

fix: bind this context for reviewController.getReview route handler

fix: add estimate validation in createTask and updateTask

feat: add contributors stats endpoints for team and individual performance

feat: add recentActivity feed to review snapshot from task history

feat: add GET /boards/:boardId/tasks/archived endpoint with 20 latest archived tasks

fix: bind this context for reviewController.getReview route handler

fix: add estimate validation in createTask and updateTask

fix: use \ in startKeyResult query filter instead of invalid positional operator

fix: relax KR weight validation to sum <= 1.0 and harden metric_progress against NaN

refactor: migrate controllers to class-based pattern, consolidate services

Запрос на слияние 'feat/notifications' (#9) из feat/notifications в dev

fix: exclude initiator from notifications and clean message formatting

feat: implement notification system with role-based delivery

fix: exclude initiator from notifications and clean message formatting

feat: implement notification system with role-based delivery

feat: add description field to Objective model

refactor: restructure OKR routing with workspace parameter

Merge remote-tracking branch 'origin/dev' into feature/okr-implementation

fix: correct OKR routing path in index.ts

Запрос на слияние 'feature/okr-implementation' (#8) из feature/okr-implementation в dev

feat: add OKR (Objectives and Key Results) feature with validation