feat(runtime): v0.0.25 — AgentIdentity pallet wired runtime composition Index 9

Phase 2.7 AGENT IDENTITY pallet wired canonical en frame_support::runtime macro
como Index 9 (post-Fees Index 8). 9 → 10 pallets composed canonical. Config trait
RuntimeEvent association wired canonical (pattern Provenance + Fees mirror).

## Changes

- crates/origin-chain-runtime/src/lib.rs:298 — Index 9 pub type AgentIdentity = origin_chain_agent_identity::Pallet<Runtime>
- crates/origin-chain-runtime/src/configs.rs:362 — impl origin_chain_agent_identity::Config for Runtime { type RuntimeEvent = RuntimeEvent }
- crates/origin-chain-runtime/Cargo.toml — origin-chain-agent-identity workspace dep + std feature
- crates/origin-chain-node/src/main.rs — 9 → 10 pallets listed + AgentIdentity Index 9 highlighted [Phase 2.7 scaffold v0.0.25]
- crates/origin-chain-agent-identity/src/lib.rs — Config constraint AccountId = origin_chain_types::AccountId REMOVED (usa T::AccountId generic compatible runtime ChainAccountId AccountId32) + storage updated + events updated

## Verification

- cargo build -p origin-chain-runtime 5.26s clean
- cargo test --workspace — 149 tests passing, 0 failures
- cargo build --release -p origin-chain-node 3.96s clean
- origin-chain-node info muestra 10 pallets canonical

🔌 Phase 2.7 wired canonical. Real impl v0.0.26 next.

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

crates/origin-chain-node/src/main.rs

@@ -191,7 +191,7 @@ fn print_info() {
     println!("Impl name:       {}", IMPL_NAME);
     println!("Runtime version: {}", RUNTIME_VERSION);
     println!();
-    println!("Pallets canonical (9):");
+    println!("Pallets canonical (10):");
     println!("  • Index 0  System              (frame_system foundational)");
     println!("  • Index 1  Timestamp           (pallet_timestamp block clock → Aura)");
     println!("  • Index 2  Balances            (pallet_balances OGC token CHN-2)");
@@ -201,6 +201,7 @@ fn print_info() {
     println!("  • Index 6  Session             (pallet_session 4h epoch rotation CHN-1)");
     println!("  • Index 7  Provenance          (pallet_origin_provenance asset attestation CHN-7) [Phase 2.1 COMPLETE v0.0.17]");
     println!("  • Index 8  Fees                (pallet_origin_fees cross-pillar economy OCAFB-1..6) [Phase 2.4 COMPLETE v0.0.23]");
+    println!("  • Index 9  AgentIdentity       (pallet_agent_identity AGI DIDs Inmutable #41) [Phase 2.7 scaffold v0.0.25]");
     println!();
     println!("Runtime APIs canonical (13):");
     println!("  • sp_api::Core                                  (version + execute_block)");