feat(oocana): context add host_endpoint property

[l1shen]

No description provided.

[Copilot]

Pull Request Overview

Adds a new host_endpoint property to the Context class to expose a host-accessible service URL.

• Introduces host_endpoint property fetching OO_HOST_ENDPOINT from the environment.
• Returns None when the variable is absent (e.g., in cloud environments).

Comments suppressed due to low confidence (2)

oocana/oocana/context.py:150

• Add unit tests for the new host_endpoint property to verify both when OO_HOST_ENDPOINT is set and when it is unset.

def host_endpoint(self) -> str | None:

oocana/oocana/context.py:153

• The environment variable OO_HOST_ENDPOINT is inconsistent with other host-related vars prefixed OOMOL_HOST_*. Consider aligning the prefix for consistency.

return os.getenv("OO_HOST_ENDPOINT", None)