Address review findings on declaring-type naming:
- A generic instantiation must name a TypeDef or TypeRef, so a TypeSpec
base is reported as malformed instead of followed. Naming no longer
recurses.
- TypeSpec and MethodSpec instantiation blobs are decoded with the
member-signature grammar. Malformed blobs and out-of-range TypeDef rows
are reported against their owning row and make coverage partial.
- A MethodSpec reads both columns. An invalid Method coded index is
reported; a readable Method keeps its name beside a malformed
instantiation.
- MemberCore carries its signature kind, so a field operand is named only
by a field or field-signature MemberRef. This replaces the token-table
guard.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
