## Summary
- PCH compilation now serializes document links via `pch_links_json` in
`BuildResult` and stores them in `PCHState`
- Master server merges PCH document links with main-file links on
`textDocument/documentLink` requests, fixing missing links for
`#include` directives inside the preamble
- Adds document link support for `#embed` and `__has_embed` directives
## Test plan
- [x] Unit tests: `DocumentLink.Embed` and `DocumentLink.HasEmbed` added
- [x] Integration tests: `test_document_links.py` verifies PCH + main
merge and `#embed` links
- [x] All 483 unit tests pass
- [x] All 4 integration tests pass
🤖 Generated with [Claude Code](https://claude.com/claude-code)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Document links now detect embeds and __has_embed directives for both
quoted and angled filenames.
* Document links produced during precompiled builds are cached and
merged into document-link responses for more complete link sets.
* **Tests**
* Added integration tests for merged PCH/main links and embed/has-embed
cases.
* Added unit tests verifying embed handling under C++23.
* **Chores**
* Added test fixtures and compile command entries for document-links
tests.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
8bafaa8171