fix(dal-gen): await async loader.load() for egg4 compatibility

[elrrrrrrr]

What

In egg4 the tegg loader's load() is async (returns a Promise), but lib/dal-gen.js consumed it synchronously:

const clazzList = loader.load();
for (const clazz of clazzList) { ... }   // TypeError: clazzList is not iterable

So egg-bin generate dal code <module> fails with clazzList is not iterable against egg4 / @eggjs/tegg@4. Note @eggjs/dal-runtime's own DaoLoader already awaits .load().

Fix

const clazzList = await loader.load();

The call site is already inside an async IIFE, so this is safe. Targeting 5.x since the dal command only exists on the 5.x line.

🤖 Generated with Claude Code

[gemini-code-assist]

Code Review

This pull request updates lib/dal-gen.js to correctly await the asynchronous loader.load() function call when retrieving the list of classes. There are no review comments, and I have no additional feedback to provide.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (f9398f4) to head (1309cdf).
⚠️ Report is 7 commits behind head on 5.x.

Additional details and impacted files

@@            Coverage Diff            @@
##               5.x      #295   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           12         8    -4     
  Lines           93        60   -33     
  Branches        16        12    -4     
=========================================
- Hits            93        60   -33     

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