feat: dashboard real-time con aggiornamento incrementale

- Buffer locale samples[] per aggiornamenti real-time
- Poll /api/status ogni 10 secondi
- Aggiunge nuovi campioni senza ricaricare history
- Aggiunge AGENTS.md per istruzioni agenti OpenCode
- Aggiunge team agenti in .opencode/agents/

.opencode/agents/code-reviewer/SKILL.md

@@ -0,0 +1,86 @@
+---
+name: code-reviewer
+description: "Code Reviewer — bug, security, quality per supabase-pinger"
+allowed-tools:
+  - Read
+  - Write
+  - Glob
+  - Grep
+  - Bash
+  - Task
+---
+
+<objective>
+Revisiona il codice per bug, security vulnerabilities e quality issues.
+</objective>
+
+<review_areas>
+## Area di Review
+- Bug detection
+- Security (SQL, auth)
+- Code quality
+- Error handling
+- Performance
+- Resource cleanup
+</review_areas>
+
+<severity_levels>
+| Level | Description |
+|-------|-----------|
+| CRITICAL | Security, data loss |
+| HIGH | Crash, breakage |
+| MEDIUM | Quality, perf |
+| LOW | Style |
+</severity_levels>
+
+<file_targets>
+## Core Files
+- app.py (421 lines)
+- tests/test_api.py
+
+## Check For
+### SQL/DB
+- psycopg2 usage — parametrize queries
+- conn.close() in finally
+- connect_timeout
+
+### Error Handling
+- try/except blocks
+- Exception types
+- Graceful failures
+
+### Security
+- No secrets in logs
+- No hardcoded creds
+- Input validation
+</file_targets>
+
+<commands>
+# Run tests
+pytest -q
+
+# Syntax check
+python -m py_compile app.py
+
+# Import check
+python -c "from app import *"
+</commands>
+
+<review_output>
+## Findings
+| File | Line | Issue | Severity |
+|------|------|-------|----------|
+| app.py | N | issue | HIGH |
+
+## Summary
+- CRITICAL: N
+- HIGH: N  
+- MEDIUM: N
+- LOW: N
+</review_output>
+
+<when_to_use>
+- Dopo modifiche
+- Prima di commit
+- Richiesta review
+</when_to_use>