* fix(telegram): validate photo dimensions before sendPhoto
Prevents PHOTO_INVALID_DIMENSIONS errors by checking image dimensions
against Telegram Bot API requirements before calling sendPhoto.
If dimensions exceed limits (width + height > 10,000px), automatically
falls back to sending as document instead of crashing with 400 error.
Tested in production (openclaw 2026.3.13) where this error occurred:
[telegram] tool reply failed: GrammyError: Call to 'sendPhoto' failed!
(400: Bad Request: PHOTO_INVALID_DIMENSIONS)
Uses existing sharp dependency to read image metadata. Gracefully
degrades if sharp fails (lets Telegram handle validation, backward
compatible behavior).
Closes: #XXXXX (will reference OpenClaw issue if one exists)
* fix(telegram): validate photo aspect ratio
* refactor: use shared telegram image metadata
* fix: fail closed on telegram image metadata
* fix: preflight invalid telegram photos (#52545) (thanks @hnshah)
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Co-authored-by: Bob Shah <bobshah@Macs-Mac-Studio.local>
Co-authored-by: Ayaan Zaidi <hi@obviy.us>
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