SRCH-694 return parser error for oversized days

[xinganghuang]

What

Fixes a parser crash when days() or weekdays() exceed the maximum allowed offset inside a multi-value expression (e.g. a Bt range).

Changes in ParserTools:

• tokenize_function — After FunctionResolver#call, copy resolver errors into the parser when the call returns nil (errors added during call were previously ignored).
• tokenize_multiple — Guard against nil operands so a failed function call does not cause NoMethodError on lit2[:type].
• report_function_resolver_errors — New helper that forwards each ParserError from the resolver (token, message, status, syntax, constraint) instead of a generic error message.

Also adds a parser integration test and bumps the gem to v1.3.6.

Why

For filters like:

OpenHouses Bt days(0),days(9223372036854775807)

the second days() fails validation, tokenize_function returns nil, and tokenize_multiple then dereferences nil → NoMethodError → 500 in the API.

Expected behavior is a parser error (e.g. Function call 'days' max offset 365000 days), not an unhandled exception. This change ensures resolver validation failures are surfaced to the caller the same way as other parse errors.

AI

Cursor 3.8.11, Agent, Auto

[ridley-james]

👍

[ridley-james]