v0.3.0

farm.query:vgi 0.3.0

Tracks upstream VGI main / Haybarn v1.5.4-rc1. Ports the new test-suite
features and fixes numeric type promotion. Suite: 185/185.

Core (farm.query:vgi)

• Numeric promotion — add_values/double now promote like the canonical
  Python worker: decimals gain a digit of precision, unsigned integers widen
  one tier, decimal addition merges precision/scale (TypeRules,
  ScalarHelpers unsigned + new toBigDecimal).
• Pushdown introspection — new PushdownFilters.filteredColumns() and
  hasFilterForColumn().
• Typed const decoding — VectorScalarCodec.read now decodes timestamp and
  unsigned-integer scalars predictably.

Example worker fixtures

• typed_probe table function (typed const args: TIMESTAMPTZ / INTERVAL / BLOB
  / UBIGINT with worker-side defaults).
• filtered_columns_echo table function (filter-column introspection).
• secret_field and scale_by_setting scalar functions.

Depends on farm.query:vgirpc:0.10.2.