Link check failed (scheduled run)

# Summary

| Status | Count |
|----------------|-------|
| 🔍 Total | 1103 |
| 🔗 Unique | 393 |
| ✅ Successful | 1024 |
| ⏳ Timeouts | 0 |
| 🔀 Redirected | 4 |
| 👻 Excluded | 63 |
| ❓ Unknown | 0 |
| 🚫 Errors | 16 |
| ⛔ Unsupported | 0 |

## Errors per input

### Errors in ./llms.txt

* [503] (at 135:13) | Rejected status code: 503 Service Unavailable
* [503] (at 5:469) | Rejected status code: 503 Service Unavailable
* [503] (at 136:12) | Rejected status code: 503 Service Unavailable
* [503] (at 129:12) | Rejected status code: 503 Service Unavailable
* [503] (at 5:62) | Rejected status code: 503 Service Unavailable

### Errors in invariants/invariants-framework.md

* [503] (at 29:38) | Rejected status code: 503 Service Unavailable
* [503] (at 28:45) | Rejected status code: 503 Service Unavailable
* [503] (at 35:65) | Rejected status code: 503 Service Unavailable

### Errors in languages/rust/architect.md

* [503] (at 102:12) | Rejected status code: 503 Service Unavailable

### Errors in languages/rust/developer.md

* [503] (at 151:12) | Rejected status code: 503 Service Unavailable
* [503] (at 95:30) | Rejected status code: 503 Service Unavailable

### Errors in languages/rust/reviewer.md

* [503] (at 100:12) | Rejected status code: 503 Service Unavailable
* [503] (at 9:239) | Rejected status code: 503 Service Unavailable

### Errors in operating-model/gates-and-escalation.md

* [503] (at 88:97) | Rejected status code: 503 Service Unavailable

### Errors in operating-model/mcp-and-llm-txt.md

* [503] (at 61:10) | Rejected status code: 503 Service Unavailable

### Errors in skills/chainsafe-rust-architect/SKILL.md

* [503] (at 88:16) | Rejected status code: 503 Service Unavailable

## Redirects per input

### Redirects in career/career-development/introduction.md

* https://www.notion.so/chainsafe/Core-Concepts-v1-0-1610247189c949fa9692de950518ac53 --[307]--> https://app.notion.com/p/chainsafe/Core-Concepts-v1-0-1610247189c949fa9692de950518ac53?__dm_a=1 --[307]--> https://app.notion.com/p/chainsafe/Core-Concepts-v1-0-1610247189c949fa9692de950518ac53

### Redirects in career/process-and-policy.md

* https://www.notion.so/chainsafe/Educational-Budget-c0cc6c8da3c74c6ead5f866d2fced452 --[307]--> https://app.notion.com/p/chainsafe/Educational-Budget-c0cc6c8da3c74c6ead5f866d2fced452?__dm_a=1 --[307]--> https://app.notion.com/p/chainsafe/Educational-Budget-c0cc6c8da3c74c6ead5f866d2fced452

### Redirects in languages/typescript/architect.md

* https://github.com/ChainSafe/web3.js --[301]--> https://github.com/web3/web3.js

### Redirects in workflows/oneflow.md

* https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/managing-repository-settings/configuring-tag-protection-rules --[301]--> https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-rulesets/creating-rulesets-for-a-repository

[Full Github Actions output](https://github.com/ChainSafe/engineering-handbook/actions/runs/34825777605?check_suite_focus=true)

Review the listed URLs in llms.txt, invariants/invariants-framework.md, languages/rust/*.md, operating-model/*.md, and skills/chainsafe-rust-architect/SKILL.md, starting with the scheduled GitHub Actions run linked in the issue. Check whether the reported 503 links need updating or another documented resolution, then rerun the link check and confirm the errors are gone while retaining valid redirects.

Written by the indexing model from the issue text.