feat(learn): Minimalist memory format v3.0 - 60% size reduction

BREAKING CHANGE: New compact entry format
- Header: `## {P|G}: {Title}` (P=Pattern, G=Gotcha)
- Metadata: `@YYYY-MM-DD #tag1 #tag2 | source:confidence[:reinforced]`
- Max 3 inline tags, no separators, no statistics section

Removed verbose fields: Discovered, Source, Confidence, Trigger
Statistics now calculated dynamically by /learn:status

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

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

plugins/learn/templates/memory-entry.json

@@ -1,77 +1,34 @@
 {
+  "format_version": "3.0",
   "pattern": {
-    "title": "",
-    "discovered": "",
-    "feature": "",
-    "domain": "",
-    "description": "",
-    "example": {
-      "file": "",
-      "lines": "",
-      "language": "",
-      "code": ""
-    },
-    "tags": [],
+    "type": "P",
+    "title": "max 60 char, imperativ",
+    "date": "YYYY-MM-DD",
+    "tags": ["max", "3", "tags"],
     "source": "explicit|inferred|repeated",
-    "confidence": "high|medium|low",
+    "confidence": "high|med|low",
     "reinforced": 0,
-    "last_reinforced": "",
-    "trigger": ""
+    "description": "1-2 propoziții",
+    "example": "opțional, cod cu ```lang"
   },
   "gotcha": {
-    "title": "",
-    "discovered": "",
-    "feature": "",
-    "domain": "",
-    "problem": "",
-    "solution": "",
-    "tags": [],
+    "type": "G",
+    "title": "max 60 char",
+    "date": "YYYY-MM-DD",
+    "tags": ["max", "3", "tags"],
     "source": "explicit|inferred|repeated",
-    "confidence": "high|medium|low",
+    "confidence": "high|med|low",
     "reinforced": 0,
-    "last_reinforced": "",
-    "trigger": ""
-  },
-  "statistics": {
-    "total_patterns": 0,
-    "total_gotchas": 0,
-    "total_reinforcements": 0,
-    "last_session": "",
-    "sessions_recorded": 0,
-    "last_cleanup": ""
+    "problem": "scurt",
+    "solution": "scurt"
   },
+  "metadata_format": "@{date} #{tag1} #{tag2} | {source}:{confidence}[:{reinforced}]",
   "domains": {
-    "backend": {
-      "patterns": ["src/api/**/*.ts", "src/server/**/*.ts", "services/**/*"]
-    },
-    "frontend": {
-      "patterns": ["src/components/**/*.tsx", "src/pages/**/*.tsx", "**/*.css"]
-    },
-    "database": {
-      "patterns": ["src/db/**/*.ts", "migrations/**/*.ts", "**/*.sql"]
-    },
-    "testing": {
-      "patterns": ["**/*.test.ts", "**/*.spec.ts", "tests/**/*"]
-    },
-    "deployment": {
-      "patterns": ["Dockerfile", "docker-compose.yml", "**/*.yml", "infra/**/*"]
-    },
-    "global": {
-      "patterns": []
-    }
-  },
-  "_metadata_fields": {
-    "source": {
-      "explicit": "Utilizatorul a cerut explicit salvarea (ține minte, remember)",
-      "inferred": "Dedus din conversație (eroare rezolvată, pattern detectat)",
-      "repeated": "Corecție repetată de 2+ ori pe același subiect"
-    },
-    "confidence": {
-      "high": "Semnal puternic (comandă explicită, corecție repetată)",
-      "medium": "Semnal moderat (preferință inferată, referință istorică)",
-      "low": "Semnal slab (one-time fix posibil util)"
-    },
-    "reinforced": "Numărul de ori când entry-ul a fost folosit/validat în sesiuni ulterioare",
-    "trigger": "Fraza originală care a declanșat salvarea (pentru audit/cleanup)"
+    "backend": ["src/api/**/*.ts", "src/server/**/*.ts", "services/**/*"],
+    "frontend": ["src/components/**/*.tsx", "src/pages/**/*.tsx", "**/*.css"],
+    "database": ["src/db/**/*.ts", "migrations/**/*.ts", "**/*.sql"],
+    "testing": ["**/*.test.ts", "**/*.spec.ts", "tests/**/*"],
+    "deployment": ["Dockerfile", "docker-compose.yml", "**/*.yml", "infra/**/*"],
+    "global": []
   }
 }