Aggiunge monitoraggio ops: health check, log scanner, dashboard e notifiche.

Introduce incidenti con dedup, job Sidekiq ogni 3 min, scan log cron, /up/deep,
dashboard /admin/ops e push ntfy; include Sentry opzionale e fix test suite.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/ops/log_scanner.rb

@@ -0,0 +1,26 @@
+module Ops
+  class LogScanner
+    def initialize(matcher: LogPatternMatcher.new)
+      @matcher = matcher
+    end
+
+    def ingest(text)
+      matches = @matcher.scan(text)
+      matches.each { |match| record_match(match) }
+      matches.size
+    end
+
+    private
+
+    def record_match(match)
+      Ops::IncidentRecorder.record(
+        kind: "log_pattern",
+        severity: match.severity,
+        title: "Log: #{match.name}",
+        message: match.line.truncate(500),
+        metadata: { "pattern" => match.name, "sample" => match.line },
+        fingerprint: "log_pattern:#{match.name}"
+      )
+    end
+  end
+end