Add Telegram “Project Alerts” bot MVP (aiogram)

[dkoraitest]

Motivation

• Provide a minimal MVP for a Telegram-based project reminders bot that supports CRUD tasks, role-based access, deadline reminders with color indicators, participants and document links, and a simple text report.
• Ship a runnable skeleton to iterate on: bot entrypoint, DB models, services and handlers so reminders can be scheduled and messages formatted.

Description

• Add an aiogram-based bot entrypoint in app/main.py with an AsyncIOScheduler job that runs send_daily_reminders and registers routers for start, tasks, report, notifications, and admin handlers.
• Implement DB models in app/models.py (users, projects, tasks, participants, notifications_log) and async session management in app/db.py, plus settings in app/config.py and requirements.txt for dependencies.
• Implement services: app/services/tasks.py (task lifecycle, participants, status emoji mapping), app/services/notifications.py (daily reminder selection, message building, single-send anti-spam checks, safe sending only to numeric tg_user_id, eager-load Task.project), and app/services/reports.py (counts and simple risky calculation).
• Implement handlers and UX: app/handlers/start.py, app/handlers/tasks.py (FSM for create/edit with added edit_value state and selectinload usage), app/handlers/admin.py (inline /admin set_role handling), app/handlers/report.py, app/handlers/notifications.py, plus keyboard utilities in app/keyboards.py and a permissions filter in app/permissions.py.
• Add README.md with quickstart, .gitignore, and small fixes/guardrails (e.g. skip non-numeric tg_user_id when sending reminders).

Testing

• No automated tests were run on these changes.

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Codex Task