Refactor rollup output format to match webpack-style structure

[k2tzumi]

Summary

• Add stub functions with JSDoc comments in banner for Google Apps Script editor recognition
• Change IIFE name from AppsScriptJobqueue to JobBroker
• Export JobBroker and DelayedJobBroker classes for library usage

Details

This change refactors the rollup output to match the previous webpack-style structure where:

1. Stub functions are defined at the top of the file

   • jobEventHandler()
   • enqueueAsyncJob(callback, parameter)
   • createDelaydJob(scheduled_at)
   • consumeJob(event, appGlobalThis)

   These empty function declarations allow the Google Apps Script editor to recognize them as available functions.

2. IIFE with exports

   • The bundle is wrapped in var JobBroker = (function(exports) { ... })({});
   • Exports JobBroker and DelayedJobBroker classes

3. Runtime behavior

   • The stub functions are overwritten at runtime via globalThis assignments inside the IIFE

Test plan

• Run npm test - all tests pass
• Run npm run build - bundle generates correctly
• Verify output structure matches expected format

🤖 Generated with Claude Code

[github-actions]

Code Metrics Report

	main (0dd03de)	#50 (a2e0993)	+/-
Coverage	31.8%	31.8%	0.0%
Code to Test Ratio	1:0.0	1:0.0	+0.0
Test Execution Time	4s	4s	0s

Details

  |                     | main (0dd03de) | #50 (a2e0993) | +/-  |
  |---------------------|----------------|---------------|------|
  | Coverage            |          31.8% |         31.8% | 0.0% |
  |   Files             |              2 |             2 |    0 |
  |   Lines             |             88 |            88 |    0 |
  |   Covered           |             28 |            28 |    0 |
+ | Code to Test Ratio  |          1:0.0 |         1:0.0 | +0.0 |
  |   Code              |         806732 |        806724 |   -8 |
  |   Test              |            407 |           407 |    0 |
  | Test Execution Time |             4s |            4s |   0s |

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Reported by octocov