test: add unit tests for _get_valid_timeout_config

[eeshsaxena]

Description

weaviate.util._get_valid_timeout_config validates the client's
timeout_config argument - accepting a single number (expanded to a
(connect, read) pair) or a 2-tuple of positive numbers, and raising on bad
input. It had no direct test coverage.

This adds test/test_timeout_config.py covering:

• a single int / float expanding to a pair
• a valid 2-tuple returned unchanged
• ValueError on non-positive numbers, wrong-length tuples, and tuples
  containing a non-positive number
• TypeError on None, strings, bools, and tuples containing non-numbers or
  bools (bools are explicitly rejected even though bool is a subclass of
  int)

No source changes.

Verification

pytest test/test_timeout_config.py - 15 passed. ruff check /
ruff format --check clean.

[orca-security-eu]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca

[weaviate-git-bot]

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