Add DRAWING_PAGE_COUNT_TOO_LARGE exception type

The core-reader API rejects redaction requests when the incoming drawing
exceeds the server page limit, returning a new error type
DRAWING_PAGE_COUNT_TOO_LARGE. Teach the client to parse it so the read
loop does not crash on an unknown enum value.

- Add the member to the v2 TechreadExceptionType enum
- Add the member to the legacy v1 W24TechreadExceptionType enum for parity
- Bump the package version to 2.6.0 so the server (which gates on the
  client-reported version > 2.5.0) will emit the new error
- Extend the enum tests with the new value and a TechreadMessage
  round-trip parse test

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01M562dp6QvASsxKrmHcQv8A

Author: claude

pyproject.toml

@@ -3,7 +3,7 @@ requires = ["wheel", "setuptools"]
 
 [project]
 name = "werk24"
-version = "2.5.0"
+version = "2.6.0"
 description = "AI-powered platform for extracting and analyzing data from technical drawings / CAD drawings to enhance manufacturing workflows."
 readme = { file = "README.md", content-type = "text/markdown" }
 license = { file = "LICENSE.txt" }

tests/test_exception_types.py

@@ -1,5 +1,11 @@
+from uuid import uuid4
+
 from werk24.models.v1.techread import W24TechreadExceptionType
-from werk24.models.v2.internal import TechreadExceptionType
+from werk24.models.v2.internal import (
+    TechreadExceptionType,
+    TechreadMessage,
+    TechreadMessageType,
+)
 
 
 def test_configuration_incorrect_enum_present():
@@ -10,3 +16,39 @@ def test_configuration_incorrect_enum_present():
         W24TechreadExceptionType.CONFIGURATION_INCORRECT.value
         == "CONFIGURATION_INCORRECT"
     )
+
+
+def test_drawing_page_count_too_large_enum_present():
+    assert (
+        TechreadExceptionType.DRAWING_PAGE_COUNT_TOO_LARGE.value
+        == "DRAWING_PAGE_COUNT_TOO_LARGE"
+    )
+    assert (
+        W24TechreadExceptionType.DRAWING_PAGE_COUNT_TOO_LARGE.value
+        == "DRAWING_PAGE_COUNT_TOO_LARGE"
+    )
+
+
+def test_message_parses_drawing_page_count_too_large():
+    """A TechreadMessage carrying the new exception_type must parse
+    without raising a pydantic ValidationError.
+    """
+    message = TechreadMessage.model_validate_json(
+        f"""{{
+            "request_id": "{uuid4()}",
+            "message_type": "ERROR",
+            "message_subtype": "COMPLETED",
+            "exceptions": [
+                {{
+                    "exception_level": "ERROR",
+                    "exception_type": "DRAWING_PAGE_COUNT_TOO_LARGE"
+                }}
+            ]
+        }}"""
+    )
+    assert message.message_type == TechreadMessageType.ERROR
+    assert len(message.exceptions) == 1
+    assert (
+        message.exceptions[0].exception_type
+        == TechreadExceptionType.DRAWING_PAGE_COUNT_TOO_LARGE
+    )

werk24/models/v1/techread.py

@@ -121,6 +121,11 @@ class W24TechreadExceptionType(str, Enum):
     """ The paper size is larger that the allowed paper size
     """
 
+    DRAWING_PAGE_COUNT_TOO_LARGE = "DRAWING_PAGE_COUNT_TOO_LARGE"
+    """ The document has more pages than can be processed for an output
+    that must cover the whole document (e.g. redaction).
+    """
+
     DRAWING_MEASURE_SYSTEM_INCOMPLETE = "DRAWING_MEASURE_SYSTEM_INCOMPLETE"
     """ The file you submitted contains too few measures to be
     manufacturable

werk24/models/v2/internal.py

@@ -133,6 +133,11 @@ class TechreadExceptionType(str, Enum):
     """ The paper size is larger that the allowed paper size
     """
 
+    DRAWING_PAGE_COUNT_TOO_LARGE = "DRAWING_PAGE_COUNT_TOO_LARGE"
+    """ The document has more pages than can be processed for an output
+    that must cover the whole document (e.g. redaction).
+    """
+
 
 class TechreadException(BaseModel):
     """