0.5.0

The second "adapter kit" release (docs/spec/16, wave B): what wave A left as three copies in the adapters — the
lazy graph of a runtime-assembled container, the never-throwing part of an ORM observer, the retry decision of a
queue worker, the option descriptions of the commands — is one thing in the core. Additive: nothing was removed or
renamed. Adapters of this wave: doctrine 0.3.1, symfony-bundle 0.5.0, laravel 0.6.0, yii2 0.3.0, sitemap 0.1.1.

Added

• Adapter\ServicesBuilder / Adapter\Services (layer 2 of the kit): describe the graph once — every node
  optional, as an object or a Closure(Services): object called on first use, the framework's pieces as closures
  (httpClientLocator(), debounceStore(), queueFactory(), router(), resolverLocator(), checks(),
  events()) — and get it lazily: transport(), keys(), client(), submitter(), collector(),
  dispatcher(), rules(), urlResolver(), guardedResolver(), changes(), kit(), keyFileResponder(),
  checker(), submitterFactory(), plus hasCollected()/flushIfCollected() for the request-end hook. build()
  does no IO and throws ConfigurationException for what is statically wrong. Every accessor is one factory call
  or constructor of wave A; ServicesParityTest keeps the two layers identical. docs/adapters.md §2.
• Hook\ObserverHelper: guard() (resolve through the change handler, never throw, log at debug per URL),
  deliver(), rememberDeletion()/takeDeletion() (the URLs of a row between the before and after hooks). The
  log lines are in docs/operations.md, "ORM hooks".
• Retry\WorkerOutcome: of($results) splits retryable from final failures (retryUrls, finalUrls,
  finalReasons, retryAfter), delay($policy, $attempt), and the three log lines retryLog(), gaveUpLog(),
  finalLog(). docs/operations.md, "Queue workers".
• Console\Definitions with CommandDefinition, ArgumentDefinition, OptionDefinition: the inputs of
  check, submit, submit-<subject>, explain and key:generate declared once and rendered for symfony/console
  (applyTo()), artisan (laravelSignature()) and Yii (yiiOptions(), yiiAliases()). The sitemap package adds
  Sitemap\Console\Definitions::sitemap().
• Testing\KeyFileAssertions (H01–H03: status, content type, Cache-Control by directive, Vary: Host only
  with a hosts map) and Testing\CheckOutputAssertions (H04–H05: exit code with the output as the failure
  message, assertReady(), assertKeyFileHint()). docs/testing.md.
• Dev tooling: a coverage job in CI (pcov) with a recorded floor per package (tests/coverage-floor.txt,
  bin/coverage-floor); the development image has pcov.