Fix cron embedding token batch limits

[Floofy6]

Fixes #158

Summary

• Add a configurable EMBEDDINGS_QUEUE_MAX_BATCH_TOKENS setting and split prepared embedding queue rows into Voyage requests by estimated token budget.
• Retry oversized Voyage requests by recursively shrinking the chunk when the provider reports a 400 token-limit error.
• Align the cron workflow defaults with deployed runtime defaults instead of hardcoding the more aggressive 200-row queue, and fail the cron job visibly when the enabled queue throws.
• Document the new queue setting in the example env files and README.

Validation

• node_modules\.bin\tsc.cmd --noEmit
• node_modules\.bin\prettier.cmd --check src\cron\embedding-queue.ts src\cron\index.ts src\utils\embedding-queue.ts src\types\env.ts tests\embedding-queue.test.ts .github\workflows\cron.yml .github\workflows\update-configuration.yml README.md
• node_modules\.bin\eslint.cmd src\cron\embedding-queue.ts src\cron\index.ts src\utils\embedding-queue.ts src\types\env.ts tests\embedding-queue.test.ts
• npx --yes bun@1.3.0 test tests\embedding-queue.test.ts
• npx --yes bun@1.3.0 test tests\cron-workflow.test.ts tests\embedding-queue.test.ts tests\plugin-lifecycle.test.ts --timeout 20000
• git diff --check

AI assistance disclosure

This contribution was prepared with OpenAI Codex assistance. I inspected the issue, implemented the patch, and ran the validation commands above before submission.

[ubiquity-os-beta]

Warning

@Floofy6 this pull request must be linked to an open issue and target the repository's default branch, or it will get automatically closed.

[ubiquity-os-beta]

Warning

@Floofy6 this pull request must be linked to an open issue and target the repository's default branch, or it will get automatically closed.