refactor: LivechatInquiry out of DB Watcher

[ricardogarim]

As per the updates mentioned in PROJ-7, SCA-7 and ADR #74, this pull request focuses on relocating LivechatInquiry entity out of DB Watcher service.

Quick context to public readers

In essence, this modification empowers RocketChat's app to directly call listeners through the api.broadcast global function, eliminating the reliance on MongoDB Change Stream data propagation

Why is this beneficial? It provides better control over notifying users by enabling more precise use-case management. Unlike Change Streams, which notify every action on Mongo's documents and sometimes might result in unnecessary duplicate notifications. Moreover, it contributes to the future removal of the DB Watcher deployment, thereby optimizing resource utilization.

Proposed changes

Key changes include:

• Conditionally incorporating LivechatInquiry entity import within DB watchers on application startup based on the dbWatchersDisabled flag.
• Enabling support for the following use cases to directly trigger watch.inquiries listener event, subject to the dbWatchersDisabled flag.

Updated use cases.

Use Case	Route/Trigger	Notes

Steps to test or reproduce

1. Start RocketChat's application with the DISABLE_DB_WATCHERS flag set to true.
2. Perform a POST request to above given endpoints available on updated use cases.
3. Observe websocket received events. Related events should be of one of the below mentioned types, containing all changed fields as well as the updated permission identification data.

Event name	Trigger
${inquiry._id}	clientAction = removed or updated
department/${inquiry.department}	clientAction = removed or updated and inquiry has a department
public	clientAction = removed or updated and inquiry and inquiry doesn't have a department

All socket notifications come with the prefix livechat-inquiry-queue-observer.

Further comments

To maintain consistency and avoid potential regressions, event names and signatures have been kept unchanged on both the client and app sides. This decision streamlines efforts and mitigates the risk of unintended consequences.

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[codecov]

Codecov Report

Attention: Patch coverage is 6.06061% with 31 lines in your changes missing coverage. Please review.

Project coverage is 56.50%. Comparing base (8ac631d) to head (18ce4c6).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #32358      +/-   ##
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- Coverage    56.54%   56.50%   -0.04%     
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  Files         2484     2480       -4     
  Lines        54749    54731      -18     
  Branches     11308    11314       +6     
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- Hits         30958    30928      -30     
- Misses       21113    21134      +21     
+ Partials      2678     2669       -9     

Flag	Coverage Δ
e2e	56.18% <ø> (-0.04%)	⬇️
unit	71.98% <6.06%> (-0.11%)	⬇️

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