feat: database models and Alembic migrations — User, Recording, Transcription, Protocol, PromptTemplate, ExportFile

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/models/recording.py

@@ -0,0 +1,40 @@
+import enum
+import uuid
+
+from sqlalchemy import BigInteger, Enum, ForeignKey, Interval, String
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import Base, TimestampMixin, UUIDMixin
+
+
+class RecordingSource(str, enum.Enum):
+    web = "web"
+    telegram = "telegram"
+    lensa = "lensa"
+
+
+class RecordingStatus(str, enum.Enum):
+    uploaded = "uploaded"
+    processing = "processing"
+    done = "done"
+    error = "error"
+
+
+class Recording(UUIDMixin, TimestampMixin, Base):
+    __tablename__ = "recordings"
+
+    user_id: Mapped[uuid.UUID] = mapped_column(ForeignKey("users.id"))
+    title: Mapped[str] = mapped_column(String(500))
+    file_path: Mapped[str] = mapped_column(String(1000))
+    file_size: Mapped[int] = mapped_column(BigInteger)
+    duration: Mapped[float | None] = mapped_column(nullable=True)
+    format: Mapped[str] = mapped_column(String(20))
+    source: Mapped[RecordingSource] = mapped_column(Enum(RecordingSource))
+    status: Mapped[RecordingStatus] = mapped_column(
+        Enum(RecordingStatus), default=RecordingStatus.uploaded
+    )
+
+    user: Mapped["User"] = relationship(back_populates="recordings")
+    transcription: Mapped["Transcription | None"] = relationship(
+        back_populates="recording", uselist=False
+    )