v0.8.0

Added

• Add explicit connection lifecycle inspection (isClosed(), isReusable())
  and terminal discard() for application-owned recovery, with stale-query,
  cursor, and managed-transaction safeguards and no automatic reconnect or replay.
• Add normalized ConnectionException evidence (operation, sqlState,
  driverCode, driver, connectionLabel) for connection construction
  failures and closed/compiler-only misuse, without retaining the raw
  PDOException, driver message, or trace.
• Add an executable framework-free worker request lifecycle example with
  lazy per-role acquisition, pinned owners, monotonic idle boundaries, session
  initialization and restoration, eviction isolation, bounded counters, and
  finally cleanup.
• Add a direct MariaDB/MySQL session-hygiene probe covering session-scoped
  statement limits, functional restoration, replacement reinitialization, idle
  and lock inputs, observation boundaries, and acquisition cost.

Changed

• Normalize missing or malformed PDO errorInfo and integer exception codes
  consistently for connection construction and query execution failures, and
  mark the Connection::connect() DSN parameter #[SensitiveParameter].
• Document the framework-free worker recipe and FrankenPHP worker-loop mapping,
  session initialization and restoration, engine-specific timeout boundaries,
  per-role eviction, and application-owned lifecycle counters.
• Record the 0.8 lifecycle observation decision: lifecycle counters remain
  application-owned and no lifecycle observer is added.
• Validate min()/max() scalar returns and declare int|float|string|null,
  aligning them with sum()/average(); an unsupported driver scalar now
  throws QueryExecutionException and ADR-006 records the amendment.
• Document demonstrated write-interoperability pitfalls with executable
  fixtures and a direct-engine probe: raw vendor upsert and ignored-duplicate
  generated-ID behavior, boolean adapter ambiguity, chunk atomicity, and
  duplicate-submission reconciliation.
• Record the D5 decision to retain the transaction ownership guard and
  inspection cost, with controlled control-count tests, direct-engine component
  timings, and a paired v0.7.0 comparison (ADR-008 amended).