chore: reorganize para current/, rails 8.1, testes e readme

- move app para current/ (estrutura capistrano)
- rails 7.2 → 8.1, ruby 3.2, sqlite3 2.x
- adiciona primary_key Idinformativo no model
- schema.rb completo com todas as tabelas
- testes minitest: models (Tag, Informativo, Tema) e controllers
- readme atualizado em pt-br com stack e instruções de desenvolvimento
- gitignore exclui dump.sql, *.duckdb e sqlite3

current/config/deploy.rb

@@ -0,0 +1,32 @@
+require 'mina/rails'
+require 'mina/git'
+require 'mina/bundler'
+require 'mina/rbenv'
+
+set :user, 'polo'
+set :domain, '51.15.63.128'
+set :deploy_to, '/home/polo/apps/abrigo/ambienteja'
+set :repository, 'http://git.mostre.me:3500/rafapolo/ambienteja.git'
+set :shared_dirs, fetch(:shared_dirs, ['log', 'public/upload', 'tmp', 'tmp/pids'])
+set :shared_files, fetch(:shared_files, ['config/database.yml'])
+set :rbenv_map_bins, %w{rake gem bundle ruby rails puma pumactl}
+
+desc "Deploys the current version to the server."
+task :deploy do
+  deploy do
+    invoke :'git:clone'
+    invoke :'deploy:link_shared_paths'
+    invoke :'rbenv:load'
+    invoke :'bundle:install'
+    invoke :'rails:assets_precompile'
+    # invoke :'restart'
+  end
+end
+
+task :start do
+  command "cd #{fetch(:deploy_to)}/current; bundle exec puma -C config/puma.rb &"
+end
+  
+task :restart do
+  command "kill -SIGUSR2 `ps aux | grep tcp://0.0.0.0:3333 | grep puma | awk '{ print $2 }'`", quiet: true
+end