项目概览、参与者管理初步优化（未接入真实数据）

backend/alembic/versions/20240501_000003_drop_visit_name_from_visits.py

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+"""drop visit_name from visits"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = "20240501_000003"
+down_revision = "20240501_000002"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.drop_column("visits", "visit_name")
+
+
+def downgrade() -> None:
+    op.add_column(
+        "visits",
+        sa.Column("visit_name", sa.String(length=200), nullable=False, server_default=""),
+    )

backend/alembic/versions/20240501_000004_add_visit_template_to_studies.py

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+"""add visit template fields to studies"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = "20240501_000004"
+down_revision = "20240501_000003"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("studies", sa.Column("visit_interval_days", sa.Integer(), nullable=True))
+    op.add_column("studies", sa.Column("visit_total", sa.Integer(), nullable=True))
+    op.add_column("studies", sa.Column("visit_window_start_offset", sa.Integer(), nullable=True))
+    op.add_column("studies", sa.Column("visit_window_end_offset", sa.Integer(), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("studies", "visit_window_end_offset")
+    op.drop_column("studies", "visit_window_start_offset")
+    op.drop_column("studies", "visit_total")
+    op.drop_column("studies", "visit_interval_days")

backend/alembic/versions/20240501_000005_add_consent_date_to_subjects.py

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+"""add consent_date to subjects"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = "20240501_000005"
+down_revision = "20240501_000004"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("subjects", sa.Column("consent_date", sa.Date(), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("subjects", "consent_date")