define sqlalchemy objects for new database tables / types

backend/app/db/models/uploaded_files.py

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+import enum
+from sqlalchemy import TIMESTAMP, BigInteger, Column, Text, Enum as SqlEnum
+
+from backend.app.db.base import Base
+
+
+class FileTypeEnum(enum.Enum):
+    PHOTO_PACK = "photo_pack"
+    SITE_NOTE = "site_note"
+    RD_SAP_SITE_NOTE = "rd_sap_site_note"
+    PAS_2023_VENTILATION = "pas_2023_ventilation"
+    PAS_2023_CONDITION = "pas_2023_condition"
+    PAS_SIGNIFICANCE = "pas_significance"
+    PAR_PHOTO_PACK = "par_photo_pack"
+    PAS_2023_PROPERTY = "pas_2023_property"
+    PAS_2023_OCCUPANCY = "pas_2023_occupancy"
+
+
+class FileSourceEnum(enum.Enum):
+    PAS_HUB = "pas hub"
+    SHAREPOINT = "sharepoint"
+    HUBSPOT = "hubspot"
+
+
+class UploadedFiles(Base):
+    __tablename__ = "uploaded_files"
+
+    id = Column(BigInteger, primary_key=True)
+
+    s3_file_bucket = Column(Text, nullable=False)
+    s3_file_key = Column(Text, nullable=False)
+    s3_upload_timestamp = Column(TIMESTAMP(timezone=True), nullable=False)
+
+    landlord_property_id = Column(Text, nullable=True)
+    uprn = Column(BigInteger, nullable=True)
+    hubspot_listing_id = Column(BigInteger, nullable=True)
+
+    file_type = Column(
+        SqlEnum(FileTypeEnum, name="file_type", create_type=False), nullable=True
+    )
+
+    source = Column(
+        SqlEnum(FileSourceEnum, name="file_source", create_type=False), nullable=True
+    )