feat(clickhouse): tracked archive→CH backfill tooling (backfill.sql)

pushChanged() in both s3_cache_sync.ts and gcs_cache_sync.ts in swamp-extensions should explicitly skip .namespace.json during orphan detection, the same way it already skips .datastore-index.json, .push-queue.json, .datastore.lock, and other internal files.

The primary fix (#834) materializes the manifest into the local cache so it's no longer an orphan. This extension-side fix is belt-and-suspenders: even if the cache copy is missing for any reason, the manifest should never be treated as a deletable orphan.

What to change

In isInternalCacheFile() in both datastores/_lib/s3_cache_sync.ts and datastores/_lib/gcs_cache_sync.ts, add .namespace.json to the exclusion list:

const base = rel.split("/").pop() ?? "";
if (base === ".namespace.json") return true;

Additional context

The GCS extension uses bulkInvalidated for orphan detection (line ~1223), which fires on any bulk markDirty(). The S3 extension uses the stricter dirtyPathsOverflowed (line ~1366), which only fires after 200+ dirty path overflow. Both should protect .namespace.json regardless.

Upstream repository: https://github.com/systeminit/swamp-extensions

Automoved by swampadmin from https://github.com/swamp-club/swamp/issues/1694

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feat(clickhouse): tracked archive→CH backfill tooling (backfill.sql)

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Epic #847 · Unit 3: Migrate the 5 recompute contributions to per-event grants; delete the recompute path

Epic #847 · Unit 2: score_grants append-only ledger write-model in Mongo (shadow, no read flip)

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Telemetry not synced to swamp-club: local queue accumulating ~3 days despite valid auth

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serve --webhook usage string makes <header> look optional for generic scheme

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