Upgrade smithers-orchestrator to smthrs

[roninjin10]

The smithers-orchestrator npm package was renamed to smthrs as of Smithers 0.33.0, with no compatibility alias published under the old name.

This PR sweeps the rename across this knowledge base: 37 files updated (news digests, council episodes, aggregated summaries, and GitHub-activity records), replacing every smithers-orchestrator occurrence (including the @smithers-orchestrator/* scope, now @smthrs/*) with smthrs. No manifest or lockfile migration was needed because this repository has no Smithers dependency — the references are textual.

Verification:

• git grep smithers-orchestrator is clean on the branch.
• All changed JSON/NDJSON files re-validate after the sweep.
• Reviewer note: exact global rename only; no lockfiles or unrelated changes; migration matches the Smithers 0.33.0 changelog; smthrs 0.33.0 is published on npm.

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