Centralize Predict config ownership

[0xaslan]

Summary

• Centralizes Predict config authoring by moving feed templates and per-expiry mutable controls into ProtocolConfig.
• Localizes frozen expiry terms into ExpiryMarket and StrikeExposure so hot paths read owned state instead of central snapshots.
• Extracts StrikeGrid, removes duplicate grid storage in exposure indexes, and drops redundant registry expiry uniqueness state.

Key decisions

• ProtocolConfig owns per-expiry bindings, mint pause, and oracle policy; Registry keeps Pyth source uniqueness, version sync, pause caps, and creation orchestration.
• Frozen per-expiry values are stamped once at creation and copied into their owning objects instead of stored as central mutable-row snapshots.
• StrikeExposure keeps order strike decoding and live index ownership; this PR avoids LiveExposure or StrikeRange extraction.

Test plan

• npx -y prettier-move -c packages/predict/sources/registry.move packages/predict/sources/config/protocol_config.move --write
• sui move build --path packages/predict
• git diff --check
• sui move test --path packages/predict --gas-limit 100000000000 (not run; source-only branch, tests still need API updates)