fix(core): ignore wikilinks in inline code

[phernandez]

Supersedes #1337 by @yaodong-shen — their commit is cherry-picked here unchanged, with authorship and sign-off preserved, so the full CI matrix runs (fork PRs only get DCO/CLA/CodeQL). Will be rebase-merged so the contributor commit lands on main as-is.

Fixes #1332.

Summary

A [[wikilink]] inside an inline code span was parsed as a relation, so prose that quotes a relation line as an example minted a real graph edge (the reporter's retired hub note kept an inbound link from a backticked template example). Fenced blocks were already ignored; inline spans were not.

MarkdownIt already tokenizes code_inline before Basic Memory's relation rule runs. The fix records the exact source ranges MarkdownIt classifies as inline code (by wrapping its own backtick rule, so CommonMark delimiter/escape semantics and its linear-time unmatched-run cache are reused rather than re-implemented), then masks only the [/] characters inside those spans before relation detection. Masking is position-preserving, so targets and context are still sliced from the original source text — escapes, formatting and trailing code in relation context are retained.

Review history on #1337

Codex raised five P2s on the original PR (source preservation, escaped backticks, trailing code in explicit relations, quadratic rescans, code-span brackets inside outer wikilink targets); the author addressed each with a follow-up push and regression cases. The final push (7caf720) never got a Codex re-review, so this PR will pick that up.

Verification (local, this branch)

• uv run pytest tests/markdown tests/services tests/importers -q --no-cov — 555 passed, 2 skipped
• uv run ruff check / ruff format --check on the touched files — clean
• uv run --all-extras ty check src tests test-int — clean

🤖 Generated with Claude Code

https://claude.ai/code/session_017STCpbNsYjZgUdftxgEAZ4

[phernandez]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Nice work!

Reviewed commit: d2a3933b68

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".