kbc: residual selfcheck tickets need a kind field, dedup, and must not surface as owner question cards

[LikiosSedo]

Observed (adoption run, siflow-test, 2026-07-22)

After the repair budget was spent, the question inbox contained multiple cards all titled "自检残留待处理", each dumping raw SELFCHECK lint output (broken_link / body_source_malformed …) at the end user, alongside real content contradictions. One run produced 55+ cards of which a large fraction were infra residuals; several duplicate residual cards accumulated across rounds (content-fingerprint dedup misses because the residual text shifts every round).

Problems

1. Residual tickets carry no kind — content contradictions (owner-decidable) and mechanical lint residue (agent/operator work) land in the same user-facing queue.
2. Dedup by content fingerprint fails across repair rounds → duplicate residual cards.
3. The correct owner action for residuals is almost always "再修一轮" — i.e. it is not an owner decision at all.

Proposal

• Ticket schema: kind: contradiction | infra_residual (box writes it; code-filed residual tickets are always infra_residual).
• infra_residual routes to the maintainer/ops surface (LEDGER + status line), not the question inbox; auto-continue repair while budget remains (see fix(kbc): scale L1 auto-repair budget with open-violation workload #430 for workload-scaled budget).
• Dedup residual tickets by violation identity (page+kind set), not full-text fingerprint.

sicore side (inbox rendering/filtering by kind) needs a matching change — filed separately.