feat: Add comprehensive authentication cache reset utility

Added cj/reset-auth-cache function to recover from incorrect password
entry for encrypted files like authinfo.gpg. Resolves "Bad session key"
and "Decryption failed" errors.

Key features:
- Smart cache clearing: preserves 400-day GPG/SSH cache by default
- Optional prefix arg (C-u) to also clear gpg-agent cache
- Clears auth-source, EPA file handler, and optionally gpg-agent caches
- Bound to C-; A for easy access (removed from debug menu C-c d)

Also added cj/kill-gpg-agent for aggressive agent reset when needed.

Consolidates and replaces simpler auth-source-only version that was
previously in config-utilities.el.

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

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

0 files changed, 0 insertions, 0 deletions