fix: incoming webhook message not respecting Message_MaxAllowedSize setting

[abhinavkrin]

Proposed changes (including videos or screenshots)

This PR fixes an issue where incoming webhook messages could exceed the allowed characters per message setting.

Issue(s)

Steps to test or reproduce

Further comments

Closes SUP-796

[dionisio-bot[bot]]

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[abhinavkrin]

A potentially more appropriate place for this validation could be within the sendMessage function (apps/meteor/app/lib/server/functions/sendMessage.ts). However, applying the check there might introduce regressions in scenarios where bypassing this limit is intentional or required by existing implementations. Need a second opinion on this.

Note: This refers to the sendMessage function, not the sendMessage method (apps/meteor/app/lib/server/methods/sendMessage.ts), which already enforces this setting.

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 64.45%. Comparing base (b1d3fff) to head (d9789a6). Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #36163      +/-   ##
===========================================
+ Coverage    64.43%   64.45%   +0.02%     
===========================================
  Files         3138     3138              
  Lines       104920   104920              
  Branches     19784    19784              
===========================================
+ Hits         67601    67628      +27     
+ Misses       34631    34610      -21     
+ Partials      2688     2682       -6     

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[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: d9789a60b6120cd324f3de11c8342be52943d196

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 36 packages

Name	Type
@rocket.chat/meteor	Patch
@rocket.chat/core-typings	Patch
@rocket.chat/rest-typings	Patch
@rocket.chat/uikit-playground	Patch
@rocket.chat/api-client	Patch
@rocket.chat/apps	Patch
@rocket.chat/core-services	Patch
@rocket.chat/cron	Patch
@rocket.chat/ddp-client	Patch
@rocket.chat/freeswitch	Patch
@rocket.chat/fuselage-ui-kit	Patch
@rocket.chat/gazzodown	Patch
@rocket.chat/livechat	Patch
@rocket.chat/model-typings	Patch
@rocket.chat/ui-contexts	Patch
@rocket.chat/account-service	Patch
@rocket.chat/authorization-service	Patch
@rocket.chat/ddp-streamer	Patch
@rocket.chat/omnichannel-transcript	Patch
@rocket.chat/presence-service	Patch
@rocket.chat/queue-worker	Patch
@rocket.chat/stream-hub-service	Patch
@rocket.chat/license	Patch
@rocket.chat/omnichannel-services	Patch
@rocket.chat/pdf-worker	Patch
@rocket.chat/presence	Patch
rocketchat-services	Patch
@rocket.chat/models	Patch
@rocket.chat/network-broker	Patch
@rocket.chat/mock-providers	Patch
@rocket.chat/ui-avatar	Patch
@rocket.chat/ui-client	Patch
@rocket.chat/ui-video-conf	Patch
@rocket.chat/ui-voip	Patch
@rocket.chat/web-ui-registration	Patch
@rocket.chat/instance-status	Patch

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