feat(core): add compat.rs re-export layer for platform SDK types

[echobt]

Summary

Create a new term-core crate providing a compatibility/re-export layer that replaces local type definitions with canonical types from platform-core and platform-challenge-sdk.

Changes

• New crate term-core (core/) with path dependencies on platform-core and platform-challenge-sdk
• Re-exports from platform_core: Hotkey (replaces local [u8;32]), ChallengeId (UUID-based, replaces [u8;16]), Stake, Score, BlockHeight, ValidatorInfo, NetworkConfig, Job, JobStatus
• Re-exports from platform_challenge_sdk: WeightAssignment (f64 weights), ChallengeRoute (HttpMethod enum), RouteRequest/RouteResponse (with params/query/auth_hotkey), ChallengeError, ServerChallenge trait, ChallengeContext, ChallengeMetadata, EvaluationResult, AgentInfo, weight calculation types, submission types, data types, P2P types, database
• ChallengeConfigMeta: Thin wrapper combining ChallengeMetadata + ChallengeConfig fields with bidirectional conversion (handles dual ChallengeId type via inner UUID)
• Deprecated backward-compatible types: LegacyChallengeId, LegacyWeightAssignment, LegacyRoute with Into conversions for incremental migration
• Conversion utilities: weight_u16_to_f64/weight_f64_to_u16, challenge_id_from_bytes, method_str_to_enum/method_enum_to_str, normalize_weights, make_weight, make_route
• Prelude submodule: Single-import access to all commonly needed types
• 153 tests (126 unit + 27 doc tests) all passing
• Updated workspace Cargo.toml to include core member

[coderabbitai]

Warning

Rate limit exceeded

@echobt has exceeded the limit for the number of commits that can be reviewed per hour. Please wait 21 minutes and 45 seconds before requesting another review.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/core-compat-reexports

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}