The same string helpers were copy-pasted across CLI and service code:
trim/trimCopy in 5 files, escapeRegex in 3, hasWildcard in 2, and the
regex meta-char table in 2. Move canonical versions to
yams::common::string_utils.h (trimCopy, hasWildcard, escapeRegex,
isRegexMetaChar) and wire all call sites to them; daemon_helpers'
trim_copy now delegates. Add a Catch2 test for the shared helpers.
Kept isTransientMetadataError and annotateResultRelations untouched:
they have semantically different implementations and need a separate
review, not a mechanical merge.
