A1 — Remove downstream source ceilings (uncapped per-topic ingestion)

[gnanirahulnutakki]

Part of the content-flow redesign — see design doc ardur-pipeline/docs/redesign-content-flow-2026-06.md (ArdurAI/ardur-pipeline#14).

A1 — Remove downstream source ceilings (uncapped per-topic ingestion)

The aggregator already has no upper cap (diversityFloor: 20 in src/sources.ts is a lower bound). The effective ceilings live downstream and must be removed so the full clustered set survives to synthesis:

• ardur-top10-engine Top10Entry.references capped at 5 (handled in T1).
• ardur-article-synthesizer references.slice(0, 10) (handled in S1).

Scope (this repo)

• Confirm ingestion keeps all deduped members per cluster (no silent truncation in src/index.ts cluster assembly).
• Carry the full member/source set forward in AggregationData (works with rev-3 documentsByTopic).
• Practical limits only: per-source fetch budget, dedup, paywall/ToS. Log any drop with a reason (no silent caps).

Acceptance

• A topic with >30 clustered sources emits >30 members; no constant/slice caps the count.
• Coverage report (coverageByTopic) reflects the true ingested/deduped counts.

Depends on: C1.

[gnanirahulnutakki]

Implemented in commit 078ec34. Aggregator confirmed to have no source ceiling — diversityFloor is a lower bound, not a cap. All deduped members flow through unchanged; every drop (budget exhaustion, robots, ToS) is logged as a warning in the artifact. CONTRACT_REVISION_V3=3 local definition added; emitted when ETL runs.