32989: basic DB setup

[jahzielv]

Fixes #32989 (partially)

• initial db setup
• basic crud method

Related issue: Resolves #

Checklist for submitter

If some of the following don't apply, delete the relevant line.

• Input data is properly validated, SELECT * is avoided, SQL injection is prevented (using placeholders for values in statements)

Testing

• Added/updated automated tests
• QA'd all new/changed functionality manually

Database migrations

• Checked table schema to confirm autoupdate
• Checked schema for all modified table for columns that will auto-update timestamps during migration.
• Ensured the correct collation is explicitly set for character columns (COLLATE utf8mb4_unicode_ci).

[codecov]

Codecov Report

❌ Patch coverage is 58.87850% with 44 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.15%. Comparing base (b0866dc) to head (edba3a2).
⚠️ Report is 23 commits behind head on feat-in-house-apps.

Files with missing lines	Patch %	Lines
pkg/file/file.go	0.00%	18 Missing ⚠️
server/datastore/mysql/in_house_apps.go	69.23%	10 Missing and 2 partials ⚠️
...ations/tables/20251006163522_InHouseAppsSupport.go	81.81%	6 Missing and 2 partials ⚠️
ee/server/service/software_installers.go	0.00%	3 Missing and 1 partial ⚠️
server/fleet/software_installer.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@                 Coverage Diff                  @@
##           feat-in-house-apps   #33938    +/-   ##
====================================================
  Coverage               64.15%   64.15%            
====================================================
  Files                    2052     2054     +2     
  Lines                  206257   206477   +220     
  Branches                 6751     6751            
====================================================
+ Hits                   132321   132465   +144     
- Misses                  63543    63604    +61     
- Partials                10393    10408    +15     

Flag	Coverage Δ
backend	65.27% <58.87%> (+<0.01%)	⬆️

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[mna]

Awesome, thanks! Looks good, one small nit for the PK.