fix: raise inline upload limit to 10MB

[eldadfux]

Summary

• Raise MAX_INLINE_BYTES from 256KB to 10MB so hosted MCP can accept chat attachment bytes rewritten as inline base64 by the agent
• Aligns with Cloud/agent chat attachment max (10MB)

Companion: appwrite/agent#1

Test plan

• Upload a ~500KB–2MB file via hosted MCP with {filename, content, encoding: base64}
• Confirm files under 10MB succeed and over 10MB still fail with the size error

[greptile-apps]

Greptile Summary

Raises the decoded inline-upload limit from 256 KiB to 10 MiB to support hosted chat attachments.

• Updates MAX_INLINE_BYTES to match the Cloud/agent attachment limit.
• Documents why hosted uploads require the larger inline allowance.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete blocking or non-blocking issue identified in the changed code.

The changed constant is consumed after base64 decoding, so it directly raises the intended decoded-file limit, and the repository’s HTTP middleware replays large request bodies rather than truncating them at its sniff threshold.

Important Files Changed

Filename	Overview
src/mcp_server_appwrite/constants.py	The inline decoded-content cap is increased to 10 MiB with explanatory comments; no concrete defect was identified.

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