Clean up stale references to deleted directive files

Remove /refresh-directives references from save, checkpoint, scc, sync
commands. Trim sync.md from 400+ lines to essentials.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/commands/save.md

@@ -75,12 +75,6 @@ Format credentials as:
 1. Commit with message: "Session log: [brief description of work done]"
 2. Push to gitea remote (if configured)
 3. Confirm push was successful
-4. **Refresh directives** (MANDATORY):
-   - Auto-invoke `/refresh-directives`
-   - Re-read `directives.md` to prevent shortcut-taking
-   - Perform self-assessment for violations
-   - Confirm commitment to coordination rules
-   - Report directives refreshed
 
 ## Purpose