Fix test vector issues and reorganize file structure

- Fix authorization-required test vector to reference correct TAIP-4 instead of TAIP-15
- Add required settlementAddress field to settle/valid.json test vector
- Move top-level test vectors to appropriate subfolders based on message type:
  - valid-authorize.json → authorize/
  - valid-payment*.json → payment-request/
  - valid-revert.json → revert/
  - valid-settle.json → settle/
- Update CHANGELOG.md to document test vector fixes and reorganization

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: pelle

CHANGELOG.md

@@ -14,6 +14,20 @@ This changelog focuses on:
 - Protocol structural changes
 - Breaking changes
 
+## [2025-08-16]
+
+### Fixed
+- **Test Vector Issues**: Fixed incorrect TAIP references and missing required fields in test vectors
+  - Fixed `authorization-required/valid-authorization-required.json` to reference correct TAIP-4 instead of TAIP-15
+  - Added required `settlementAddress` field to `settle/valid.json` test vector per TAIP-4 specification
+- **Test Vector Organization**: Reorganized test vector file structure for better maintainability
+  - Moved top-level test vectors to appropriate subfolders based on message type
+  - `valid-authorize.json` → `authorize/` subfolder
+  - `valid-payment*.json` → `payment-request/` subfolder
+  - `valid-revert.json` → `revert/` subfolder
+  - `valid-settle.json` → `settle/` subfolder
+  - Ensures consistent organization with existing test vector structure
+
 ## [2025-08-13]
 
 ### Changed

test-vectors/valid-authorize.json …t-vectors/authorize/valid-authorize.jsontest-vectors/valid-authorize.json renamed to test-vectors/authorize/valid-authorize.json test-vectors/valid-authorize.json renamed to test-vectors/authorize/valid-authorize.json

@@ -15,6 +15,7 @@
     "body": {
       "@context": "https://tap.rsvp/schema/1.0",
       "@type": "https://tap.rsvp/schema/1.0#Settle",
+      "settlementAddress": "eip155:1:0x1234a96D359eC26a11e2C2b3d8f8B8942d5Bfcdb",
       "settlementId": "eip155:1:tx/0x3edb98c24d46d148eb926c714f4fbaa117c47b0c0821f38bfce9763604457c33"
     }
   },