feat: v2.1.0 - Selective saving, cleanup command, and SessionEnd hook

New features:
- /learn:analyze now uses signal detection to save only valuable lessons
  - Explicit commands: "ține minte", "remember", "memorează"
  - Stated preferences: "întotdeauna", "always", "never"
  - Repeated corrections (2+ times)
  - Historical references: "cum am discutat", "as we discussed"
- New /learn:cleanup command for memory hygiene
  - Scoring system for entry quality
  - Conservative mode with confirmation
  - Upgrade option to rewrite entries
- SessionEnd hook shows reminder on /exit, /clear, Ctrl+D
- Metadata tracking: source, confidence, reinforced, trigger

Changes:
- analyze.md: Added Pas 3.5 for signal detection
- cleanup.md: New command for reviewing/deleting entries
- hooks.json: Changed from Stop to SessionEnd
- scripts/session-end-reminder.sh: New reminder script
- Templates updated with metadata fields
- Documentation updated for v2.1.0

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

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

plugins/learn/templates/domain-memory.md

@@ -10,13 +10,43 @@ Patterns și Gotchas pentru domeniul **{DOMAIN_NAME}**.
 
 ## Patterns
 
-<!-- Patterns vor fi adăugate aici -->
+<!--
+Format pentru patterns:
+
+### Titlu Descriptiv
+**Discovered**: YYYY-MM-DD (feature: context)
+**Source**: explicit | **Confidence**: high | **Reinforced**: 0
+**Trigger**: "fraza originală care a declanșat salvarea"
+**Description**: Descriere clară a pattern-ului
+
+**Example** (`file:lines`):
+```language
+cod exemplu
+```
+
+**Tags**: tag1, tag2, tag3
+
+---
+-->
 
 ---
 
 ## Gotchas
 
-<!-- Gotchas vor fi adăugate aici -->
+<!--
+Format pentru gotchas:
+
+### Titlu Descriptiv
+**Discovered**: YYYY-MM-DD (feature: context)
+**Source**: explicit | **Confidence**: high | **Reinforced**: 0
+**Trigger**: "fraza originală care a declanșat salvarea"
+**Problem**: Ce a mers prost
+**Solution**: Cum s-a rezolvat
+
+**Tags**: tag1, tag2
+
+---
+-->
 
 ---
 
@@ -24,5 +54,7 @@ Patterns și Gotchas pentru domeniul **{DOMAIN_NAME}**.
 
 - **Total Patterns**: 0
 - **Total Gotchas**: 0
+- **Total Reinforcements**: 0
 - **Last Session**: -
 - **Sessions Recorded**: 0
+- **Last Cleanup**: -