hosting lane B follow-up: re-vendor the hosting cards that import the network MVP's quorum and pool, and wire one credit per operator #1793

Part of #1761 (self-hosting slice 1b, lane B follow-up).

gHashTag/t27#8853 (PR gHashTag/t27#8854, merged as be30c2f78) replaced the hosting cards' TODO copies with imports from the network MVP hardening specs:

• proof.t27 imports safe_m from network/quorum.t27; verdicts are unchanged.
• sybil.t27 adds rule 6, one credit per operator per job, counted with network/quorum.t27's operator_votes, where every owner-tier key is the owner.
• credit.t27 holds its per-receipt rate against network/pool.t27's split.
• statement.t27 closes its TODO in comments only; its wasm is unchanged.

This lane re-vendors those cards into hosting-mvp and wires rule 6 into the Queen.

Do

• Copy the four specs byte-identical, rebuild proof, row, credit and sybil wasm (two builds, one hash), regenerate the t27c gen-ts constants, and update specs/PIN.
• hosting-cards.ts: add the wrappers operatorFirst, operatorsOf, operatorCredit and sybilWorldTotal.
• hosting-queen.ts: when a job closes under the sybil rules, credit each agreeing receipt through operator_credit, after the card says whether it is the first of its operator.
• Tests: run tests/api/hosting*.test.ts and tests/pglive/hosting-store-live.test.ts on a throwaway Postgres.

Boundary

• trios/agent-server/specs/hosting/{proof,sybil,credit,statement}.t27
• trios/agent-server/specs/hosting/{proof,row,credit,sybil}.wasm
• trios/agent-server/specs/PIN (the hosting lines only)
• trios/agent-server/apps/server/src/api/services/queen-hosting-{proof,row,credit,sybil}-card.gen.ts
• trios/agent-server/apps/server/src/api/services/hosting-cards.ts
• trios/agent-server/apps/server/src/api/services/hosting-queen.ts
• trios/agent-server/apps/server/tests/api/hosting-economics.test.ts

Not touched: queen-network-job.ts, job_rules.*, queen-network-* (the peer lane's).

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