Restore accumulator-root Move unit tests

[0xaslan]

Summary

• Bump Account/Predict-related Move.lock framework revisions to the current Sui 1.74-compatible framework.
• Restore empty-root accumulator helpers and revive Account/Predict accumulator-root Move tests, removing all .move.disabled test files.
• Add test-only support for split Block Scholes feed bundles and PLP valuation/wrong-vault coverage while documenting the remaining nonzero accumulator settlement gap.

Key decisions

• Tests use sui::accumulator::create_for_testing for empty roots only.
• Nonzero address-balance settlement barrier flows remain out of scope because package-local Move unit tests still cannot populate the system settlement barrier.
• Restored tests were adjusted to current pricing/feed, same-timestamp, finite-range, and floor-share behavior instead of reintroducing old assumptions.

Test plan

• sui move test --path packages/account --gas-limit 100000000000 (11 passed)
• sui move test --path packages/predict --gas-limit 100000000000 (312 passed)
• find packages -name '*.disabled' -print (empty)