v0.6.0

Findings of the consumer pilot (ecosystem-sandbox, cska-one) before 1.0:

• Behavior change: ParseError::toPath() quotes keys that are not plain
  names ([A-Za-z_][A-Za-z0-9_]*): $['a.b'], $['user@example.com'],
  $['0'] — $.a.b was ambiguous between the key a.b and the keys a,
  b. Segments and toJsonPointer() are unchanged.
• Behavior change: an unknown key is reported as Unknown property at
  its path; the message no longer repeats the key. Input keys appear in
  paths only, never in messages (stability contract wording updated).
• ParseResult::$value is typed TValue|null, so the shape the Psalm
  plugin infers is visible on the result, not only through orThrow().
• toWire() of into() and object schemas is typed array<string, mixed>
  for an object / array input: the "event is one schema" recipe needs no
  @var.
• README: the plugin does not infer constraints (int<0, max>,
  non-empty-string); annotate a schema returned from a helper method;
  the recipe pays off for multi-field payloads; parseJson() attaches no
  JsonException.