Enhance Telegram bot with database integration and API features

- Added SQLite database support with Alembic for migrations.
- Implemented FastAPI for HTTP API to manage duties.
- Updated configuration to include database URL and HTTP port.
- Created entrypoint script for Docker to handle migrations and permissions.
- Expanded command handlers to register users and display duties.
- Developed a web application for calendar display of duties.
- Included necessary Pydantic schemas and SQLAlchemy models for data handling.
- Updated requirements.txt to include new dependencies for FastAPI and SQLAlchemy.

alembic/versions/001_initial_users_and_duties.py

@@ -0,0 +1,44 @@
+"""Initial users and duties tables
+
+Revision ID: 001
+Revises:
+Create Date: 2025-02-17
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+revision: str = "001"
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "users",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("telegram_user_id", sa.BigInteger(), nullable=False),
+        sa.Column("full_name", sa.Text(), nullable=False),
+        sa.Column("username", sa.Text(), nullable=True),
+        sa.Column("first_name", sa.Text(), nullable=True),
+        sa.Column("last_name", sa.Text(), nullable=True),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("telegram_user_id"),
+    )
+    op.create_table(
+        "duties",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("user_id", sa.Integer(), nullable=False),
+        sa.Column("start_at", sa.Text(), nullable=False),
+        sa.Column("end_at", sa.Text(), nullable=False),
+        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ),
+        sa.PrimaryKeyConstraint("id"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("duties")
+    op.drop_table("users")