chore: release hotdata-langchain v0.13.0

[rohan-hotdata]

Summary

Release hotdata-langchain v0.13.0.

Checklist

• Version bumped in pyproject.toml
• CHANGELOG.md updated
• CI green

After merge, run ./scripts/release.sh publish from a clean main checkout.

[claude]

super nit: the reflow leaves line 41 dangling at ~40 chars mid-paragraph, where the rest of the file wraps near 100. (not blocking)

Suggested change

	is built (letters, digits, underscores or hyphens; the whole name within 64 characters, the
	shortest tool-name limit among the providers this package is used with) rather than when a
	provider first rejects a call. An explicit
	is built (letters, digits, underscores or hyphens; the whole name within 64 characters, the
	shortest tool-name limit among the providers this package is used with) rather than when a
	provider first rejects a call. An explicit

[claude]

super nit: correcting my suggestion above — that one was a no-op. This is the actual rewrap. (not blocking)

Suggested change

	is built (letters, digits, underscores or hyphens; the whole name within 64 characters, the
	shortest tool-name limit among the providers this package is used with) rather than when a
	provider first rejects a call. An explicit
	`search_tool_name` is used exactly as given, since naming that tool is already the caller's
	decision. `suffixed_tool_name` is exported for callers registering tools of their own
	alongside these.
	is built (letters, digits, underscores or hyphens; the whole name within 64 characters, the
	shortest tool-name limit among the providers this package is used with) rather than when a
	provider first rejects a call. An explicit `search_tool_name` is used exactly as given, since
	naming that tool is already the caller's decision. `suffixed_tool_name` is exported for
	callers registering tools of their own alongside these.