Parse long literals in FilterExpressionTextParser

[wxggzz]

What

FilterExpressionTextParser parsed every bare integer literal as Integer, so a filter expression whose value exceeds the int range — e.g. a long metadata id used when deleting by id — failed with:

java.lang.NumberFormatException: For input string: "9223372036854775807"

Fix

visitIntegerConstant now falls back to Long when the literal doesn't fit in an int, while still returning Integer for smaller values (backward compatible). Literals with an explicit L suffix keep going through the existing visitLongConstant path, and values inside IN/NIN arrays are covered too since they delegate to the same visitor.

Tests

Added testLongValueLiteral covering Long.MAX_VALUE / Long.MIN_VALUE and asserting that in-range values still parse as Integer. All 16 parser tests pass locally:

./mvnw -pl spring-ai-vector-store -am -Dtest=FilterExpressionTextParserTests -Dsurefire.failIfNoSpecifiedTests=false test

Fixes #4705