fix: hashing to avoid doc with duplicate name to collide

[saccharin98]

No description provided.

[saccharin98]

Code review

No issues found. Checked for bugs (race conditions, data corruption, logic errors, edge cases) — no significant problems introduced by this PR.

Notes:

• The two potential concerns (parallel indexing race, raw/wiki name mismatch when file is already in raw/) were evaluated and determined to be false positives: the hash suffix prevents collisions in the normal code path, and lint.py's registry lookup correctly handles the naming indirection.

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[rejojer]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

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[saccharin98]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

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