fix(artifacts): retain raw archive keys across entry projections

Publish Godot res:// declarations and PyInstaller CArchive/PYZ keys through
shared occurrence source_path while preserving safe logical extraction paths.
Consolidate PyInstaller file, directory and namespace projection through one
owner, and account for the additional retained source spelling before allocation.

Cover producer inventory, Windows separator conversion, PYZ module/data keys,
CLI extraction bytes and retained MCP inventory views. Format fixtures are
synthetic; real Godot/PyInstaller producer lanes were not run.

docs/python-packaged-applications.md

@@ -25,8 +25,12 @@ metadata retains the original name, table index, type, compression flag,
 relative offset and known directory record extent. Logical paths follow the
 carrier's path dialect: backslashes separate components for PE carriers, while
 they remain literal filename characters for POSIX carriers. The source name
-always retains its stored spelling. If the carrier dialect is unconfirmed, REA
-preserves backslashes verbatim instead of inferring POSIX semantics.
+always retains its stored spelling in occurrence `source_path` and
+`format_metadata.source_name`. For PYZ rows, that source is the exact module or
+data key in the PYZ table, not a reconstructed filesystem name;
+`format_metadata.container_name` identifies the containing PYZ image. If the
+carrier dialect is unconfirmed, REA preserves backslashes verbatim instead of
+inferring POSIX semantics.
 `relative_offset` is relative to the CArchive start for CArchive rows, or to
 the decoded PYZ image for PYZ rows. A CArchive directory record starts at
 `archive_start + toc_offset + directory_record_offset`; its size is