UN-2805 [FEAT] Add custom_data parameter for API deployment variable replacement overrides (#202)

* UN-2805 Add user_data parameter for API deployment variable replacement overrides

- Added USER_DATA constant to MetadataKey class for user data handling
- Updated BaseTool to extract and store user_data from execution metadata
- Version bump to v0.77.2

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

* UN-2805 Rename user_data to custom_data for consistency

- Renamed USER_DATA constant to CUSTOM_DATA in MetadataKey class
- Updated BaseTool to use custom_data instead of user_data
- Version bump to v0.77.3

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

---------

Signed-off-by: jagadeeswaran-zipstack <[email protected]>
Co-authored-by: Claude <[email protected]>

Author: jagadeeswaran-zipstack

src/unstract/sdk/__init__.py

@@ -1,5 +1,4 @@
-__version__ = "v0.77.2"
-
+__version__ = "v0.77.3"
 
 def get_sdk_version() -> str:
     """Returns the SDK version."""

src/unstract/sdk/constants.py

@@ -135,8 +135,7 @@ class MetadataKey:
     OUTPUT = "output"
     OUTPUT_TYPE = "output_type"
     LLM_PROFILE_ID = "llm_profile_id"
-    USER_DATA = "user_data"
-
+    CUSTOM_DATA = "custom_data"
 
 class ToolSettingsKey:
     """A class representing the keys used in the tool settings.

src/unstract/sdk/tool/base.py

@@ -94,7 +94,7 @@ def from_tool_args(cls, args: list[str]) -> "BaseTool":
             tool.source_file_name = tool._exec_metadata.get(MetadataKey.SOURCE_NAME, "")
             tool.org_id = tool._exec_metadata.get(MetadataKey.ORG_ID)
             tool.llm_profile_id = tool._exec_metadata.get(MetadataKey.LLM_PROFILE_ID)
-            tool.user_data = tool._exec_metadata.get(MetadataKey.USER_DATA, {})
+            tool.custom_data = tool._exec_metadata.get(MetadataKey.CUSTOM_DATA, {})
         return tool
 
     def elapsed_time(self) -> float: