fix(openai): sanitize urls when counting tokens in images

[ccurme (ccurme)]

No description provided.

[codspeed-hq]

Merging this PR will degrade performance by 15.74%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

❌ 5 regressed benchmarks
✅ 14 untouched benchmarks
⏩ 15 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	WallTime	test_import_time[PydanticOutputParser]	541.7 ms	642.9 ms	-15.74%
❌	WallTime	test_import_time[InMemoryVectorStore]	607.1 ms	679.8 ms	-10.69%
❌	WallTime	test_import_time[RunnableLambda]	507.5 ms	577.3 ms	-12.11%
❌	WallTime	test_import_time[ChatPromptTemplate]	635 ms	715.8 ms	-11.29%
❌	WallTime	test_import_time[LangChainTracer]	446.7 ms	507.8 ms	-12.03%

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_{Comparing cc/oai_image_token_counting (2b928cd) with master (0493b27)}

Footnotes

1. 15 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩