Basisimplementierung für Mailversandt.

migrations/versions/20260116_create_messages.py

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+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers:
+revision = "20260116_create_messages"
+down_revision = None  # oder deine letzte Revision
+
+def upgrade():
+    op.create_table(
+        "messages",
+        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
+        sa.Column("mailbox_id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("message_id", sa.String(512), nullable=True),
+        sa.Column("subject", sa.String(2048), nullable=True),
+        sa.Column("from_addr", sa.String(2048), nullable=True),
+        sa.Column("to_addr", sa.String(4096), nullable=True),
+        sa.Column("date_header", sa.TIMESTAMP(timezone=True), nullable=True),
+        sa.Column("received_at", sa.TIMESTAMP(timezone=True), nullable=False),
+        sa.Column("raw_eml", sa.LargeBinary(), nullable=False),
+    )
+    op.create_index("ix_messages_date", "messages", ["date_header"])
+    op.create_index("ix_messages_message_id", "messages", ["message_id"])
+    op.create_index("ix_messages_mailbox", "messages", ["mailbox_id"])
+
+def downgrade():
+    op.drop_table("messages")
+

migrations/versions/918e1dd7c598_merge_message_branch_and_baseline.py

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+"""merge message-branch and baseline
+
+Revision ID: 918e1dd7c598
+Revises: 20260116_create_messages, bb8e2c8e4b8f
+Create Date: 2026-01-16 14:20:04.807623
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '918e1dd7c598'
+down_revision: Union[str, Sequence[str], None] = ('20260116_create_messages', 'bb8e2c8e4b8f')
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    pass
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    pass