feat(candidate): export shared knowledge references

[drewstone]

Problem

agent-runtime had to hand-roll conversion between agent-knowledge candidate hashes and the shared AgentCandidate knowledge reference. That duplicated a knowledge-domain boundary in every consumer.

Solution

• export two strict conversion functions from agent-knowledge
• validate shared digests with agent-interface 0.26.1
• update agent-eval to 0.119.1
• stabilize the loaded offline adaptive comparison timeout

Proof

• pnpm test: 29 files passed, 2 skipped; 281 tests passed, 10 skipped
• pnpm typecheck
• pnpm lint: 98 files clean
• pnpm build
• packed export imported and round-tripped through agentCandidateKnowledgeSchema
• independent adversarial audit findings resolved
• git merge-tree --write-tree origin/main HEAD succeeded

[tangletools]

✅ Auto-approved drewstone PR — f5a809a4

This PR was opened by the trusted drewstone account.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: drewstone_author · 2026-07-14T16:07:28Z}

[tangletools]

✅ Auto-approved drewstone PR — f5a809a4

This PR was opened by the trusted drewstone account.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: drewstone_author · 2026-07-14T16:07:42Z}