MSSQL Source Connector

[lsabi]

Which issue does this PR address?

Partially Closes # #3573
Relates to #

Rationale

This is just the implementation of the source connector for the cdc. I'm also working on the table polling, but it'll require more time.

I don't have a database instance to test it, but tests are passing. If someone, who has a test MSSQL instance can try it out, it would be great.

What changed?

Added the

Local Execution

• Unit Tests pass. Not tested with a real database instance, as I don't have an instance with dummy data to ruin (only production)
• Pre-commit hooks not ran

AI Usage

None

[github-actions]

Thanks for the PR. It is labeled S-waiting-on-review and queued for review.

Slash commands (own line, regular comment) move it around the queue:

• /ready - back to S-waiting-on-review after addressing feedback
• /author - flip to S-waiting-on-author while you finish changes
• /request-review @user-or-team - request a reviewer

See CONTRIBUTING.md for details.

[lukaszzborek]

@lsabi please make this pr as draft or close it and add test, then reopen
there is docker image microsoft/mssql-server which you can use

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.10%. Comparing base (01a64b2) to head (3c54da0).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3851      +/-   ##
============================================
- Coverage     76.58%   74.10%   -2.48%     
  Complexity     1046     1046              
============================================
  Files          1347     1345       -2     
  Lines        171018   170768     -250     
  Branches     142372   142389      +17     
============================================
- Hits         130967   126547    -4420     
- Misses        36233    40534    +4301     
+ Partials       3818     3687     -131     

Components	Coverage Δ
Rust Core	75.78% <ø> (ø)
Java SDK	63.67% <ø> (ø)
C# SDK	33.11% <ø> (-39.17%)	⬇️
Python SDK	88.70% <ø> (ø)
PHP SDK	82.97% <ø> (ø)
Node SDK	89.68% <ø> (-6.61%)	⬇️
Go SDK	53.01% <ø> (-16.17%)	⬇️
see 162 files with indirect coverage changes

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[lsabi]

@lukaszzborek I'm afraid but I can't test it on my locale. I've spent a day understanding the docs, as it's not super clear how one should do in order to build their own connector.

I've then let my laptop run for almost a day and it did not finish compiling, just excessive heating.

I managed to compile mssql_source in a couple of hours, but not the runtime nor even the whole project. If you want, you can test it, but I've discovered that iggy and runtime are separate and require two different processes in order to run, which is what I did not want (I though the dynamic runtime could start up libraries on the fly and was part of the "core").

[lukaszzborek]

@lsabi, quite intresting. Did you join to our discord? there are many people which can help. You can find discord invite in readme. Also you can merge current master to yours, because you have old version of server. And please write on discord what machine do you have (where you compile code)