docs: use v-prefix for versions in changelog

Ensures rendered markdown links match git tags.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: grokify

CHANGELOG.json

@@ -4,7 +4,7 @@
   "repository": "https://github.com/agentplexus/agentkit",
   "releases": [
     {
-      "version": "0.4.0",
+      "version": "v0.4.0",
       "date": "2026-02-02",
       "highlights": [
         { "description": "Model Context Protocol (MCP) server for AI assistant tool integration" },
@@ -35,7 +35,7 @@
       ]
     },
     {
-      "version": "0.3.0",
+      "version": "v0.3.0",
       "date": "2026-01-04",
       "added": [
         { "description": "OmniVault integration for unified secret management (`config/omnivault.go`)" },
@@ -56,7 +56,7 @@
       ]
     },
     {
-      "version": "0.2.0",
+      "version": "v0.2.0",
       "date": "2025-12-31",
       "added": [
         { "description": "IaC configuration package for AgentCore deployments" }
@@ -66,7 +66,7 @@
       ]
     },
     {
-      "version": "0.1.0",
+      "version": "v0.1.0",
       "date": "2025-12-29",
       "added": [
         { "description": "Initial release with core agent framework" },

CHANGELOG.md

@@ -8,7 +8,7 @@ and this changelog is generated by [Structured Changelog](https://github.com/gro
 
 ## [Unreleased]
 
-## [0.4.0] - 2026-02-02
+## [v0.4.0] - 2026-02-02
 
 ### Highlights
 
@@ -43,7 +43,7 @@ and this changelog is generated by [Structured Changelog](https://github.com/gro
 
 - Update Go versions in CI workflow ([`607ee24`](https://github.com/agentplexus/agentkit/commit/607ee24))
 
-## [0.3.0] - 2026-01-04
+## [v0.3.0] - 2026-01-04
 
 ### Added
 
@@ -64,7 +64,7 @@ and this changelog is generated by [Structured Changelog](https://github.com/gro
 - `SecureConfig` now supports OmniVault as primary secrets source
 - Added `WithSecretsProvider()`, `WithAWSSecretsManager()`, `WithAutoSecretsProvider()` options
 
-## [0.2.0] - 2025-12-31
+## [v0.2.0] - 2025-12-31
 
 ### Added
 
@@ -74,7 +74,7 @@ and this changelog is generated by [Structured Changelog](https://github.com/gro
 
 - Bump `github.com/agentplexus/vaultguard` from 0.1.0 to 0.2.0
 
-## [0.1.0] - 2025-12-29
+## [v0.1.0] - 2025-12-29
 
 ### Added
 
@@ -96,8 +96,8 @@ and this changelog is generated by [Structured Changelog](https://github.com/gro
 
 - Remove unused error return from `loadSecureCredentials`
 
-[unreleased]: https://github.com/agentplexus/agentkit/compare/0.4.0...HEAD
-[0.4.0]: https://github.com/agentplexus/agentkit/compare/0.3.0...0.4.0
-[0.3.0]: https://github.com/agentplexus/agentkit/compare/0.2.0...0.3.0
-[0.2.0]: https://github.com/agentplexus/agentkit/compare/0.1.0...0.2.0
-[0.1.0]: https://github.com/agentplexus/agentkit/releases/tag/0.1.0
+[unreleased]: https://github.com/agentplexus/agentkit/compare/v0.4.0...HEAD
+[v0.4.0]: https://github.com/agentplexus/agentkit/compare/v0.3.0...v0.4.0
+[v0.3.0]: https://github.com/agentplexus/agentkit/compare/v0.2.0...v0.3.0
+[v0.2.0]: https://github.com/agentplexus/agentkit/compare/v0.1.0...v0.2.0
+[v0.1.0]: https://github.com/agentplexus/agentkit/releases/tag/v0.1.0