feat(runtime): Phase 2.1 v0.0.15 — Provenance pallet wired runtime + BoundedVec agent_chain

8 pallets composed total (Provenance Index 7 wired canonical). DC PROVENANCE_PALLET_V1
5/10 firmas en ratificación — procediendo paralelo per "notify and continue" canonical.

Deliverables canonical:
- Pallet wire: configs.rs Config impl + lib.rs runtime composition macro pallet_index(7) Provenance
- Alias `Provenance` (NO OriginProvenance que conflictaría con trait existente)
- BoundedVec<AccountId, ConstU32<10>> replace Vec en AssetAttestation.agent_chain
- Inmutable #41 pragmatic bound canonical: max 10 AGI co-authors per asset
- Removed #[pallet::without_storage_info] (MaxEncodedLen ahora satisfied)
- AccountId + Signature: DecodeWithMemTracking derive added (FRAME stable2512+ requirement)
- AssetAttestation: Encode/Decode/DecodeWithMemTracking/MaxEncodedLen/TypeInfo SCALE derives
- 4 nuevos tests boundary canonical (max 10 enforce + boundary accepted + SCALE roundtrip)

Verification end-to-end:
- cargo check workspace verde 2.14s
- 82+ tests pass workspace
- cargo build release 5.57s clean
- info subcommand muestra 8 pallets (Provenance index 7)
- build-spec subcommand NO regression Slice 3 mock-WASM chain_spec

Roadmap canonical post-v0.0.15:
- v0.0.16 Real Ed25519 verify (post Ergon Cap 42+ sub-crate)
- v0.0.17 Runtime API verify_provenance PROV-8
- v0.1.0 Full integration testnet Q3 2026

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 (7):");
+    println!("Pallets canonical (8):");
     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)");
@@ -199,6 +199,7 @@ fn print_info() {
     println!("  • Index 4  Aura                (pallet_aura PoA block production CHN-1)");
     println!("  • Index 5  Grandpa             (pallet_grandpa finality gadget CHN-1)");
     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 scaffold v0.0.15]");
     println!();
     println!("Runtime APIs canonical (11):");
     println!("  • sp_api::Core                                  (version + execute_block)");