Add year note (2025) to research agents for accurate date awareness

Added "The current year is 2025" note to all 4 research agents so they
don't assume outdated dates when searching for documentation:
- best-practices-researcher
- framework-docs-researcher
- git-history-analyzer
- repo-research-analyst

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

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

plugins/compounding-engineering/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "compounding-engineering",
-  "version": "2.6.1",
+  "version": "2.6.2",
   "description": "AI-powered development tools. 23 agents, 16 commands, 11 skills, 2 MCP servers for code review, research, design, and workflow automation.",
   "author": {
     "name": "Kieran Klaassen",