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backend/src/models/connection.py

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+# [DEF:backend.src.models.connection:Module]
+#
+# @SEMANTICS: database, connection, configuration, sqlalchemy, sqlite
+# @PURPOSE:   Defines the database schema for external database connection configurations.
+# @LAYER:     Domain
+# @RELATION:  DEPENDS_ON -> sqlalchemy
+#
+# @INVARIANT: All primary keys are UUID strings.
+
+# [SECTION: IMPORTS]
+from sqlalchemy import Column, String, Integer, DateTime
+from sqlalchemy.sql import func
+from .mapping import Base
+import uuid
+# [/SECTION]
+
+# [DEF:ConnectionConfig:Class]
+# @PURPOSE: Stores credentials for external databases used for column mapping.
+class ConnectionConfig(Base):
+    __tablename__ = "connection_configs"
+
+    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
+    name = Column(String, nullable=False)
+    type = Column(String, nullable=False) # e.g., "postgres"
+    host = Column(String, nullable=True)
+    port = Column(Integer, nullable=True)
+    database = Column(String, nullable=True)
+    username = Column(String, nullable=True)
+    password = Column(String, nullable=True) # Encrypted/Obfuscated password
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+# [/DEF:ConnectionConfig:Class]
+
+# [/DEF:backend.src.models.connection:Module]