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_pattern_matcher.rb

@@ -0,0 +1,37 @@
+module Ops
+  class LogPatternMatcher
+    Match = Struct.new(:name, :severity, :line, keyword_init: true)
+
+    def initialize(patterns: nil)
+      @patterns = patterns || load_patterns
+    end
+
+    def scan(text)
+      return [] if text.blank?
+
+      matches = []
+      text.each_line do |line|
+        @patterns.each do |pattern|
+          next unless line.match?(pattern[:regex])
+
+          matches << Match.new(name: pattern[:name], severity: pattern[:severity], line: line.strip)
+        end
+      end
+      matches
+    end
+
+    private
+
+    def load_patterns
+      path = Rails.root.join("config/ops_log_patterns.yml")
+      raw = YAML.safe_load(File.read(path), permitted_classes: [], aliases: true) || {}
+      Array(raw["patterns"]).map do |entry|
+        {
+          name: entry["name"].to_s,
+          severity: entry["severity"].to_s,
+          regex: Regexp.new(entry["regex"], Regexp::IGNORECASE)
+        }
+      end
+    end
+  end
+end