Feature/mongodb source

[Luishfs]

Which issue does this PR close?

Closes #3042

Rationale

What changed?

Added MongoDB as a source connector

Local Execution

• Passed
  Video

simplescreenrecorder2-2026-05-20_08.15.01.mp4

showing results ( with the master branch updated, since last video was a month ago )

• Pre-commit hooks passed
  last commit with prek

AI Usage

1. Claude
2. Claude for general rust questions & MongoDB insertion bash i used in the video
3. Didn't use generated code
4. Yes ( just might need a bit of time since i pushed it just now =P )

[github-actions]

Thanks for the pull request. It is now waiting for review, labeled S-waiting-on-review.

You can update that label as the review goes back and forth, with slash commands - each on its own line, in a regular PR comment (not an inline review reply):

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See CONTRIBUTING.md for details.

[hubcio]

@amuldotexe maybe you wanna take a stab at reviewing this? :) from quick glance I can see that docs are not updated and no actual integration tests are added.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 105 lines in your changes missing coverage. Please review.
✅ Project coverage is 10.55%. Comparing base (99c82b8) to head (2c67bfe).

Files with missing lines	Patch %	Lines
core/connectors/sources/mongodb_source/src/lib.rs	0.00%	105 Missing ⚠️

❌ Your patch check has failed because the patch coverage (0.00%) is below the target coverage (50.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #3285       +/-   ##
=============================================
- Coverage     73.78%   10.55%   -63.24%     
  Complexity      943      943               
=============================================
  Files          1200     1136       -64     
  Lines        109116    90146    -18970     
  Branches      86004    71772    -14232     
=============================================
- Hits          80516     9512    -71004     
- Misses        25874    80502    +54628     
+ Partials       2726      132     -2594     

Components	Coverage Δ
Rust Core	2.21% <0.00%> (-72.72%)	⬇️
Java SDK	58.44% <ø> (ø)
C# SDK	15.53% <ø> (-53.93%)	⬇️
Python SDK	81.43% <ø> (ø)
Node SDK	87.48% <ø> (-3.97%)	⬇️
Go SDK	13.11% <ø> (-26.80%)	⬇️

Files with missing lines	Coverage Δ
core/connectors/sources/mongodb_source/src/lib.rs	0.00% <0.00%> (ø)

... and 882 files with indirect coverage changes

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[hubcio]

for now @Luishfs please fix CI (commit Cargo.lock) and add integration tests.
/author