Add monitoring TG service

alembic/versions/0008_add_sections.py

@@ -0,0 +1,110 @@
+"""sub-sections inside each vertical (e.g. Real Estate → Dubai / Moscow)
+
+A channel now belongs to exactly one section, and each section to exactly
+one vertical. The migration auto-creates a `Общий` section per vertical
+that has at least one channel and pins all existing channels there, so the
+service keeps working without manual reclassification after upgrade.
+
+Revision ID: 0008
+Revises: 0007
+Create Date: 2026-05-20
+
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "0008"
+down_revision: Union[str, None] = "0007"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "sections",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("vertical", sa.String(length=32), nullable=False),
+        sa.Column("slug", sa.String(length=64), nullable=False),
+        sa.Column("title", sa.String(length=255), nullable=False),
+        sa.Column("emoji", sa.String(length=8), nullable=True),
+        sa.Column("description", sa.Text(), nullable=True),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            nullable=False,
+            server_default=sa.func.now(),
+        ),
+        sa.UniqueConstraint("vertical", "slug", name="uq_section_vertical_slug"),
+    )
+    op.create_index("ix_sections_vertical", "sections", ["vertical"])
+
+    # Auto-create a `default` section for each vertical that already has channels,
+    # so the backfill below has somewhere to point.
+    op.execute(
+        """
+        INSERT INTO sections (vertical, slug, title, emoji)
+        SELECT DISTINCT c.vertical,
+                        'default',
+                        CASE c.vertical
+                            WHEN 'hr' THEN 'Общий HR'
+                            ELSE 'Общий'
+                        END,
+                        CASE c.vertical WHEN 'hr' THEN '👥' ELSE '🏠' END
+        FROM channels c
+        ON CONFLICT (vertical, slug) DO NOTHING
+        """
+    )
+
+    # Add nullable section_id first so the backfill can populate it.
+    op.add_column(
+        "channels",
+        sa.Column("section_id", sa.Integer(), nullable=True),
+    )
+    op.create_foreign_key(
+        "fk_channels_section",
+        "channels",
+        "sections",
+        ["section_id"],
+        ["id"],
+        ondelete="RESTRICT",
+    )
+    op.create_index("ix_channels_section_id", "channels", ["section_id"])
+
+    op.execute(
+        """
+        UPDATE channels c
+        SET section_id = s.id
+        FROM sections s
+        WHERE s.vertical = c.vertical AND s.slug = 'default'
+        """
+    )
+
+    # Now we can safely require section_id.
+    op.alter_column("channels", "section_id", nullable=False)
+
+    # Per-section LLM prompt keys are longer than 64 chars
+    # (`llm_system_prompt:real_estate:some-long-slug`), so widen the key column.
+    op.alter_column(
+        "app_settings",
+        "key",
+        existing_type=sa.String(length=64),
+        type_=sa.String(length=128),
+        existing_nullable=False,
+    )
+
+
+def downgrade() -> None:
+    op.alter_column(
+        "app_settings",
+        "key",
+        existing_type=sa.String(length=128),
+        type_=sa.String(length=64),
+        existing_nullable=False,
+    )
+    op.drop_index("ix_channels_section_id", table_name="channels")
+    op.drop_constraint("fk_channels_section", "channels", type_="foreignkey")
+    op.drop_column("channels", "section_id")
+    op.drop_index("ix_sections_vertical", table_name="sections")
+    op.drop_table("sections")