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/prompt_template.py

@@ -0,0 +1,28 @@
+import enum
+
+from sqlalchemy import Boolean, Enum, String, Text
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import Base, TimestampMixin, UUIDMixin
+
+
+class TemplateType(str, enum.Enum):
+    client_survey = "client_survey"
+    client_intro = "client_intro"
+    internal = "internal"
+    custom = "custom"
+
+
+class PromptTemplate(UUIDMixin, TimestampMixin, Base):
+    __tablename__ = "prompt_templates"
+
+    name: Mapped[str] = mapped_column(String(255))
+    description: Mapped[str] = mapped_column(String(1000), default="")
+    type: Mapped[TemplateType] = mapped_column(Enum(TemplateType))
+    system_prompt: Mapped[str] = mapped_column(Text)
+    user_prompt: Mapped[str] = mapped_column(Text)
+    output_schema: Mapped[dict] = mapped_column(JSONB, default=dict)
+    is_default: Mapped[bool] = mapped_column(Boolean, default=False)
+
+    protocols: Mapped[list["Protocol"]] = relationship(back_populates="template")