chore: Bump version to 2.7.1 for hotfix release

Version Bump:
- pyproject.toml: 2.8.0-dev → 2.7.1
- src/skill_seekers/__init__.py: 2.8.0-dev → 2.7.1
- src/skill_seekers/cli/__init__.py: 2.8.0-dev → 2.7.1
- src/skill_seekers/mcp/__init__.py: 2.8.0-dev → 2.7.1
- src/skill_seekers/mcp/tools/__init__.py: 2.8.0-dev → 2.7.1

CHANGELOG:
- Added v2.7.1 entry documenting critical config download bug fix
- Root cause, solution, files fixed, impact, and testing documented

This hotfix resolves the critical 404 error bug when downloading configs
from the skillseekersweb.com API.

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

src/skill_seekers/mcp/__init__.py

@@ -28,6 +28,6 @@ Usage:
     in ~/.config/claude-code/mcp.json
 """
 
-__version__ = "2.8.0-dev"
+__version__ = "2.7.1"
 
 __all__ = ["agent_detector"]

src/skill_seekers/mcp/tools/__init__.py

@@ -11,7 +11,7 @@ Tools are organized by functionality:
 - source_tools: Config source management (fetch, submit, add/remove sources)
 """
 
-__version__ = "2.8.0-dev"
+__version__ = "2.7.1"
 
 from .config_tools import (
     generate_config as generate_config_impl,