feat: colors for card tags

models/card_tag.py

@@ -1,6 +1,6 @@
 from typing import TYPE_CHECKING
 
-from sqlalchemy import ForeignKey, Column, Table, UniqueConstraint, Index
+from sqlalchemy import ForeignKey, Column, Table, Index
 from sqlalchemy.orm import mapped_column, Mapped, relationship
 
 from models import BaseModel
@@ -8,7 +8,6 @@ from models import BaseModel
 if TYPE_CHECKING:
     from models import Project, Card
 
-
 cards_card_tags = Table(
     'cards_card_tags',
     BaseModel.metadata,
@@ -17,6 +16,16 @@ cards_card_tags = Table(
 )
 
 
+class CardTagColor(BaseModel):
+    __tablename__ = "card_tag_colors"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    label: Mapped[str] = mapped_column(unique=True)
+    color: Mapped[str] = mapped_column(unique=True)
+    background_color: Mapped[str] = mapped_column(unique=True)
+    is_deleted: Mapped[bool] = mapped_column(default=False, nullable=False)
+
+
 class CardTag(BaseModel):
     __tablename__ = 'card_tags'
 
@@ -40,6 +49,15 @@ class CardTag(BaseModel):
         back_populates='tags',
     )
 
+    tag_color_id: Mapped[int] = mapped_column(
+        ForeignKey('card_tag_colors.id'),
+        nullable=False,
+    )
+    tag_color: Mapped[CardTagColor] = relationship(
+        'CardTagColor',
+        lazy='selectin',
+    )
+
     __table_args__ = (
         Index('idx_card_name_project_id', 'name', 'project_id', 'is_deleted'),
     )