fix(docs): Fixing python linting issues (#399)

* fix python lint

* fix

Author: Mr-Leshiy

specs/generators/src/docs/graphviz_doc_diagram.py

@@ -201,6 +201,10 @@ def __eq__(self, other: object) -> bool:
             return NotImplemented
         return self.name == other.name
 
+    def __hash__(self) -> int:
+        """Hash."""
+        return hash(self.name)
+
 
 class DotSignedDoc(BaseModel):
     """Table representing a single signed document."""
@@ -328,6 +332,16 @@ def __eq__(self, other: object) -> bool:
 
         return self.id == other.id and self.port == other.port
 
+    def __hash__(self) -> int:
+        """Hash."""
+        return hash(
+            (
+                self.id,
+                self.port,
+                self.dir,
+            )
+        )
+
     def __repr__(self) -> str:
         """Repr."""
         return "DotLinkEnd()"
@@ -357,6 +371,10 @@ def __eq__(self, other: object) -> bool:
 
         return self.src == other.src and self.dst == other.dst
 
+    def __hash__(self) -> int:
+        """Hash."""
+        return hash((self.src, self.dst, self.directed, self.theme))
+
     def __repr__(self) -> str:
         """Repr."""
         return "DotLink()"