5.0.0

• BREAKING: Added property-based activation for MMDB deserialization. Types
  with [MapKey]-annotated init properties can now be deserialized without a
  [Constructor]-annotated constructor.
• The [Parameter] attribute has been renamed to [MapKey]. The old
  [Parameter] attribute still works but is marked obsolete and will be removed
  in a future major release.
• BREAKING: InjectAttribute.ParameterName renamed to
  InjectAttribute.Name.
• Improved lookup performance on .NET 8+ by using Span-based bounds-checked
  pointer access in the memory-mapped buffer and by reducing reflection overhead
  in the value-type decode path.
• Fixed OverflowException when reading databases larger than 2 GiB where data
  section pointers resolved to offsets exceeding the 32-bit integer maximum.
  Reported by Yuri Simernitski. GitHub #263.
• Fixed search tree record handling to correctly interpret unsigned 32-bit
  record values that exceed the signed 32-bit integer maximum, so that databases
  with large data sections are supported.
• Fixed data section pointer decoding to correctly read unsigned 32-bit pointer
  values, so that pointers to offsets beyond 2 GiB in the data section are
  resolved correctly.
• BREAKING: FileAccessMode.Memory and the Reader(Stream) constructor now
  use anonymous memory-mapped files internally instead of byte[]. This removes
  the previous ~2.1 GiB size limitation but may break environments where
  memory-mapped files are not supported, such as WASM/browser runtimes, some
  mobile/sandboxed runtimes, or hardened containers with restricted
  shared-memory syscalls. Non-seekable streams also now require a writable temp
  directory.