Added the photo_service.py and modified photo.py to have all the crud operations

src/pilgrim/models/photo.py

@@ -1,3 +1,5 @@
+from typing import Any
+
 from sqlalchemy import Column, Integer, String
 from sqlalchemy.orm import relationship
 
@@ -12,8 +14,16 @@ class Photo(Base):
     name = Column(String)
     addition_date = Column(String)
     caption = Column(String)
-    entries = relationship(
+    entries:relationship = relationship(
         "Entry",
         secondary=photo_entry_association,
         back_populates="photos"
     )
+    def __init__(self, filepath, name, addition_date=None, caption=None, entries=None, **kw: Any):
+        super().__init__(**kw)
+        self.filepath = filepath
+        self.name = name
+        self.addition_date = addition_date
+        self.caption = caption
+        self.entries = entries
+