fix(openclaw-plugin): gate low-score resource recall

[Mijamind719]

Summary

Replaces #2084 with a smaller, current-main-based fix for noisy OpenClaw resource recall.

• add resource-aware recall score gating for viking://resources/ results
• keep user/agent memory threshold behavior unchanged
• make recall query tokenization Unicode-aware so Cyrillic query terms can contribute lexical overlap
• document the focused design in docs/plans/2026-06-10-openclaw-resource-recall-gating-design.md

Verification

• npm test -- tests/ut/memory-ranking.test.ts tests/ut/context-engine-assemble.test.ts
• npm run build
• git diff --check

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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🎫 Ticket compliance analysis ✅ 2084 - Fully compliant Compliant requirements: Added resource-aware recall score gating for viking://resources/ results Kept user/agent memory threshold behavior unchanged Made recall query tokenization Unicode-aware for Cyrillic support Added design documentation Added unit tests for the new functionality

⏱️ Estimated effort to review: 3 🔵🔵🔵⚪⚪

🏅 Score: 92

🧪 PR contains tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ No major issues detected

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