feat: Implement Text-to-Speech (TTS) functionality with API endpoints, models, and service integration

app/models/tts.py

@@ -0,0 +1,26 @@
+"""TTS model."""
+
+from datetime import datetime
+from typing import Any
+
+from sqlalchemy import JSON, Column
+from sqlmodel import Field, SQLModel
+
+
+class TTS(SQLModel, table=True):
+    """Text-to-Speech generation record."""
+
+    __tablename__ = "tts"
+
+    id: int | None = Field(primary_key=True)
+    text: str = Field(max_length=1000, description="Text that was converted to speech")
+    provider: str = Field(max_length=50, description="TTS provider used")
+    options: dict[str, Any] = Field(
+        default_factory=dict,
+        sa_column=Column(JSON),
+        description="Provider-specific options used"
+    )
+    sound_id: int | None = Field(foreign_key="sound.id", description="Associated sound ID")
+    user_id: int = Field(foreign_key="user.id", description="User who created the TTS")
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)