feat: implement researcher and publication management with sync functionality

backend/app/db/models.py

@@ -1,9 +1,11 @@
-from sqlalchemy import Column, String, Boolean, Integer, DateTime, Text
+from sqlalchemy import Column, String, Boolean, Integer, DateTime, Text, ForeignKey
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.sql import func
+from sqlalchemy.orm import relationship
 from .session import Base
 import uuid
 
+
 class Researcher(Base):
     __tablename__ = "researchers"
 
@@ -11,18 +13,48 @@ class Researcher(Base):
     orcid_id = Column(String(19), unique=True, nullable=False)
     name = Column(Text)
     authenticated = Column(Boolean, default=False)
-    access_token = Column(Text)
-    last_sync_at = Column(DateTime)
+    access_token = Column(Text, nullable=True)
+    last_sync_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    publications = relationship(
+        "Publication",
+        back_populates="researcher",
+        cascade="all, delete-orphan"
+    )
+
+    sync_jobs = relationship(
+        "SyncJob",
+        back_populates="researcher",
+        cascade="all, delete-orphan"
+    )
+
 
 class Publication(Base):
     __tablename__ = "publications"
 
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
-    researcher_id = Column(UUID(as_uuid=True))
+    researcher_id = Column(UUID(as_uuid=True), ForeignKey("researchers.id"))
     put_code = Column(Integer)
     title = Column(Text)
+    journal = Column(Text)
     doi = Column(Text)
     pub_year = Column(Integer)
     type = Column(Text)
     hash_fingerprint = Column(Text)
-    last_modified = Column(DateTime)
+    last_modified = Column(DateTime(timezone=True))
+
+    researcher = relationship("Researcher", back_populates="publications")
+
+
+class SyncJob(Base):
+    __tablename__ = "sync_jobs"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    researcher_id = Column(UUID(as_uuid=True), ForeignKey("researchers.id"))
+    status = Column(String(20))
+    new_records = Column(Integer, default=0)
+    updated_records = Column(Integer, default=0)
+    started_at = Column(DateTime(timezone=True), server_default=func.now())
+    finished_at = Column(DateTime(timezone=True))
+
+    researcher = relationship("Researcher", back_populates="sync_jobs")