Add errors to documentation

Author: willtai

docs/source/api.rst

@@ -40,3 +40,57 @@ HybridCypherRetriever
 
 .. autoclass:: neo4j_genai.retrievers.hybrid.HybridCypherRetriever
    :members:
+
+
+******
+Errors
+******
+
+
+RetrieverInitializationError
+============================
+
+.. autoclass:: neo4j_genai.exceptions.RetrieverInitializationError
+   :members:
+
+
+SearchValidationError
+=====================
+
+.. autoclass:: neo4j_genai.exceptions.SearchValidationError
+   :members:
+
+
+FilterValidationError
+=====================
+
+.. autoclass:: neo4j_genai.exceptions.FilterValidationError
+   :members:
+
+
+EmbeddingRequiredError
+======================
+
+.. autoclass:: neo4j_genai.exceptions.EmbeddingRequiredError
+   :members:
+
+
+RecordCreationError
+===================
+
+.. autoclass:: neo4j_genai.exceptions.RecordCreationError
+   :members:
+
+
+Neo4jIndexError
+===============
+
+.. autoclass:: neo4j_genai.exceptions.Neo4jIndexError
+   :members:
+
+
+Neo4jVersionError
+=================
+
+.. autoclass:: neo4j_genai.exceptions.Neo4jVersionError
+   :members:

src/neo4j_genai/exceptions.py

@@ -17,7 +17,7 @@
 class RetrieverInitializationError(Exception):
     """Exception raised when initialization of a retriever fails."""
 
-    def __init__(self, errors):
+    def __init__(self, errors: str):
         super().__init__(f"Initialization failed: {errors}")
         self.errors = errors
 
@@ -31,7 +31,7 @@ def __init__(self, errors):
 
 
 class FilterValidationError(Exception):
-    """Exception raised when an embedding method is required but not provided."""
+    """Exception raised when input validation for metadata filtering fails."""
 
     pass