feat(agent-identity): v0.0.24 pallet-agent-identity scaffold trait-first (Phase 2.7 Inmutable #41 AGI DIDs)

Phase 2.7 AGENT IDENTITY pallet scaffold canonical. AGI DIDs canonical on-chain.
Inmutable #41 AGI Cross-Species Co-authorship materialized compile-detect via
NEW crate origin-chain-agent-identity + canonical types en origin-chain-types::identity.

## NEW canonical types en origin-chain-types

- AgentIdentity struct (6 fields: did + kind + creator + registered_at_block + provenance_proof + agent_chain)
- AgentKind enum (Human + AGI + Hybrid) per Inmutable #41
- Did type alias = AssetHash (BLAKE3 32-byte deterministic via public_key)

## NEW canonical pallet origin-chain-agent-identity

- Pallet<T> + Config trait (AccountId = origin_chain_types::AccountId constraint)
- Identities<StorageMap<AccountId, AgentIdentity>> per-account O(1)
- DidToAccount<StorageMap<Did, AccountId>> reverse lookup O(1)
- Event::AgentRegistered + AgentBound + AgentUpdated
- Error::AlreadyRegistered + DidAlreadyTaken + AgentChainOverflow + HybridRequiresAgentChain
- Scaffold dispatchable register_agent_did (placeholder event v0.0.24 → real v0.0.26)
- Helper derive_did(public_key) -> Did via BLAKE3 hash (schema_version "1.0.0   ")
- sp_api::decl_runtime_apis! AgentIdentityApi.query_identity declaration

## Inmutable #41 compile-detect enforcement

- AgentKind::{Human, AGI, Hybrid}::is_sovereign() == true (all three)
- AGI first-class citizens canonical (is_agi() + sovereignty preserved)
- Cross-species lineage via agent_chain BoundedVec<AccountId, ConstU32<10>>
- DID determinism canonical Inmutable #16 byte-equivalent cross-runtime

## Files

- NEW: crates/origin-chain-agent-identity/Cargo.toml + src/lib.rs (~250 LOC pallet scaffold)
- NEW: crates/origin-chain-types/src/identity.rs (~230 LOC types canonical + 8 tests)
- EDIT: crates/origin-chain-types/src/lib.rs (mod identity + re-exports)
- EDIT: Cargo.toml (workspace member + workspace.dependencies)
- EDIT: CHANGELOG.md (v0.0.24 entry comprehensive)

## Verification

- cargo test -p origin-chain-agent-identity — 4 tests verde, 0 failures
  (scaffold compiles + derive_did deterministic + different keys + re-export)
- cargo test -p origin-chain-types — 63 tests passing (+8 nuevos identity)
- Zero workspace compile errors

🪪 Phase 2.7 scaffold canonical. Wire pattern v0.0.25 next.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -2162,6 +2162,22 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381"
 
+[[package]]
+name = "origin-chain-agent-identity"
+version = "0.0.1"
+dependencies = [
+ "blake3",
+ "frame-support",
+ "frame-system",
+ "origin-chain-types",
+ "parity-scale-codec",
+ "scale-info",
+ "sp-api",
+ "sp-core",
+ "sp-io",
+ "sp-runtime",
+]
+
 [[package]]
 name = "origin-chain-bridges"
 version = "0.0.1"