feat(governance): v0.0.32 Phase 5.2 Council scaffold + member management (CHN-4 Technical Council)

Phase 5.2 TECHNICAL COUNCIL scaffold + management canonical. Extension del
existing origin-chain-governance pallet (NO new crate). 5-7 Council members
canonical per CHN-4 5.2.

## Council types + storage canonical

- CouncilMember struct (account + joined_at_block + role)
- CouncilRole enum (Member + Chair)
- MAX_COUNCIL_SIZE = 7 const + council_veto_threshold 2/3 ceiling
- Council StorageMap + CouncilSize StorageValue cached

## Council dispatchables + helpers canonical

- add_council_member (ensure_root, 6-step canonical)
- remove_council_member (ensure_root, 5-step canonical)
- Pallet::is_council_member + current_council_size + required_veto_votes pure helpers

## Council events + errors canonical

- Event::CouncilMemberAdded + CouncilMemberRemoved
- Error::NotCouncilMember + AlreadyCouncilMember + CouncilSizeExceeded

## Verification

- cargo test -p origin-chain-governance — 24 tests verde, 0 failures
  (7 Council scenarios + 17 prior governance preserved)

🏛️ Phase 5.2 scaffold canonical. Veto + Runtime API v0.0.33 next → Phase 5.2 COMPLETE.

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

CHANGELOG.md

@@ -6,6 +6,50 @@ by [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). Versions follow
 
 ## [Unreleased]
 
+## [0.0.32] — 2026-05-25 — Phase 5.2 Council scaffold + member management (CHN-4 5.2 Technical Council)
+
+**🏛️ Phase 5.2 TECHNICAL COUNCIL scaffold + management canonical** — Extension del
+existing `origin-chain-governance` pallet con Council membership management.
+Pattern Phase 5.1 extension (NO new crate, evolved existing). 5-7 Council
+members canonical per CHN-4 5.2.
+
+### Deliverables v0.0.32
+
+**Council types canonical en pallet module**:
+- `CouncilMember` struct (3 fields: account + joined_at_block + role)
+- `CouncilRole` enum (Member + Chair) — Chair tie-breaking authority Phase 5.5+
+- `MAX_COUNCIL_SIZE = 7` constant canonical CHN-4 5.2
+- `council_veto_threshold(size) -> u32` const fn (2/3 ceiling division)
+
+**Council storage canonical**:
+- `Council<StorageMap<AccountId, CouncilMember>>` O(1) membership lookup
+- `CouncilSize<StorageValue<u32>>` cached size for O(1) threshold check
+
+**Council events + errors canonical**:
+- `Event::CouncilMemberAdded` + `CouncilMemberRemoved`
+- `Error::NotCouncilMember` + `AlreadyCouncilMember` + `CouncilSizeExceeded`
+
+**Council dispatchables canonical (ensure_root governance-only)**:
+- `add_council_member(origin, account, role)` 6-step canonical
+- `remove_council_member(origin, account)` 5-step canonical
+
+**Helpers canonical**:
+- `Pallet::<T>::is_council_member(&account) -> bool` pure query
+- `Pallet::<T>::current_council_size() -> u32`
+- `Pallet::<T>::required_veto_votes() -> u32` (2/3 current size)
+
+### Verification end-to-end canonical
+
+- ✅ `cargo test -p origin-chain-governance` — **24 tests verde, 0 failures**:
+  - 7 Council scenarios (add + non-root rejected + duplicate + remove + non-member + max size + 2/3 threshold)
+  - 17 prior governance tests preserved (no regressions)
+
+### Roadmap canonical post-v0.0.32
+
+| Version | Trigger |
+|---------|---------|
+| **v0.0.33** | **veto_proposal dispatchable + Runtime API CouncilApi → Phase 5.2 COMPLETE** |
+
 ## [0.0.31] — 2026-05-25 — Phase 5.1 FOUNDATION COMPLETE — Runtime API GovernanceApi.query_proposal + query_vote 🎉
 
 **🎉 Phase 5.1 GOVERNANCE pallet FOUNDATION COMPLETE end-to-end** — Runtime API