test(pm): consensus_sim zero-sum supply + early-exit deferred-claim coverage (PR #124)

[chiliec]

Summary

Follow-up to #142 (the t15 standalone replay, now merged). Adds two CI-wired consensus_sim cases to tests/consensus_sim/scenarios/test_pm_lifecycle.cpp that exercise the PM money paths through the real evaluators + database + settlement cron — closing the two coverage gaps flagged in the PR #124 round-4 review.

supply_conserved_binary_lifecycle

A full binary-market lifecycle (create → extra LP add → unequal two-sided bets → oracle resolve → parimutuel settle with a 6% fee schedule) that asserts current_supply grows by exactly block inflation (CHAIN_DIGITAL_ASSET_ISSUED_PER_BLOCK × blocks).

This is the PR's core safety claim — prediction markets never mint or burn; current_supply untouched — asserted end-to-end for the first time. The existing 51-case suite checks local balances and the pure compute_settlement result struct, but supply_conserved() in the harness is a stub invoked 0× in the PM scenarios.

early_exit_deferred_claim_paid_from_bucket

The F1/#300 early-exit deferred-claim path had zero integration coverage (grep deferred/early_exit/claim_paid across tests/ = 0). This opens a leveraged position, has a whale bet the same side to push it into profit, closes betting so the settlement force-close records the bettor residual as an outcome-contingent deferred claim (asserts it is deferred, not refunded), then resolves the winning side and asserts the claim pays from the bounded early-exit bucket and every claim row is consumed at settlement.

Verification

Built the full chain + consensus_sim_tests target locally and ran both:

Running 2 test cases...
*** No errors detected

Observed values from the real run:

• supply case: delta=26000 == expected_inflation=26000 (blocks=26)
• early-exit case: position closes profitable (cv=1232992 > obligation=1100000), bettor_received=132992 recorded as a deferred claim on side A (n=1 total=132992); trader balance unchanged at close (deferred), then rises by exactly 132992 after settlement (paid from the bucket).

Purely additive (273 lines, no existing code touched). Both cases append to pm_lifecycle_suite and auto-register with Boost — no CMake change; they run under ctest/CI like the other 51 cases.