Release 0.3 standards-impact check

Release 0.3 filesystem recognition adds no canonical identifier scheme, metadata vocabulary, normalization rule, or standards conformance claim. Numbered sequence and span recognition is based on filename syntax. Sidecar recognition preserves files without interpreting their contents.

The AVCHD adapter recognizes only the conventional PRIVATE/AVCHD/BDMV directory shape needed to preserve a card as one package. Member roles use the open-world org.postproject.avchd namespace and remain adapter descriptions, not normative AVCHD terms. Unknown files are not discarded from a production because the recognizer never mutates an existing import.

Technical metadata in the 0.3 release series retains source keys or maps them through documented PostProject-owned vocabulary terms; it does not imply that ffprobe output is an authoritative standards interpretation.