Data Model: Org Init Template Security Remediation

No persistent domain entities added. Pipeline value objects remain:

TypeModuleNotes
ParsedTemplateresolvekind stays local \
ResolveErrorresolveNew rule ids: template.scheme_rejected
SubstituteErrorsubstituteNew rule id: substitute.path_token (entry names)
PipelineErrorpipelineUsed for explicit nil-source and install guards
GitSourcegit_sourceNew construction flag inject_token: bool = True

Ignore / copy behaviour: symlink entries are non-copied; not represented as a separate type.