feat(agent): add Task Agent for structured task execution and improve context management

migrations/versions/2df073c7b564_add_task_agent_type_agents_table.py

@@ -0,0 +1,43 @@
+"""add_task_agent_type_agents_table
+
+Revision ID: 2df073c7b564
+Revises: 611d84e70bb2
+Create Date: 2025-05-14 11:46:39.573247
+
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = "2df073c7b564"
+down_revision: Union[str, None] = "611d84e70bb2"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint("check_agent_type", "agents", type_="check")
+    op.create_check_constraint(
+        "check_agent_type",
+        "agents",
+        "type IN ('llm', 'sequential', 'parallel', 'loop', 'a2a', 'workflow', 'crew_ai', 'task')",
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint("check_agent_type", "agents", type_="check")
+    op.create_check_constraint(
+        "check_agent_type",
+        "agents",
+        "type IN ('llm', 'sequential', 'parallel', 'loop', 'a2a', 'workflow', 'crew_ai')",
+    )
+    # ### end Alembic commands ###