feat(domains): add one-line description (#173)

* feat(domains): refactored domains + added new governance domain

* feat(use-cases): rename section, strip confidential placeholder

* fix(changelog): PR refs on Unreleased entries, link ERC-3643 pattern

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

* feat(domains): added one liner description in frontmatter

* Update domains/payments.md

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <[email protected]>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: 3 people

domains/custody.md

@@ -1,6 +1,7 @@
 ---
 title: "Domain: Custody"
 status: draft
+description: "Protect keys, controls, and recovery while preserving scoped oversight for legitimate auditors and successors."
 ---
 
 ## TLDR

domains/data-oracles.md

@@ -1,6 +1,7 @@
 ---
 title: "Domain: Data & Oracles"
 status: draft
+description: "Bind onchain logic to signed facts while keeping the underlying source data confidential."
 ---
 
 ## TLDR

domains/funds-assets.md

@@ -1,6 +1,7 @@
 ---
 title: "Domain: Funds & Assets"
 status: draft
+description: "Hold and transfer claims with hidden positions and verifiable audit across the asset lifecycle."
 ---
 
 ## TLDR

domains/governance.md

@@ -1,6 +1,7 @@
 ---
 title: "Domain: Civic Coordination & Governance"
 status: draft
+description: "Coordinate, vote, and signal with verifiable outcomes but unlinkable participants."
 ---
 
 ## TLDR

domains/identity-compliance.md

@@ -1,6 +1,7 @@
 ---
 title: "Domain: Identity & Compliance"
 status: draft
+description: "Prove eligibility and authority without exposing PII, even when the issuer is unavailable or adversarial."
 ---
 
 ## TLDR

domains/payments.md

@@ -1,6 +1,7 @@
 ---
 title: "Domain: Payments"
 status: draft
+description: "Move value with stakeholder-scoped visibility, from institutional settlement to last-mile disbursement."
 ---
 
 ## TLDR

domains/post-quantum.md

@@ -1,6 +1,7 @@
 ---
 title: "Domain: Post-Quantum Threats"
 status: draft
+description: "Migrate privacy and authentication to PQ-safe foundations before harvested ciphertexts can be decrypted."
 ---
 
 ## TLDR

domains/trading.md

@@ -1,6 +1,7 @@
 ---
 title: "Domain: Trading"
 status: draft
+description: "Execute and settle without leaking intent, size, or counterparties to the wider market."
 ---
 
 ## TLDR