Addresses 3 findings from the automated review on PR #3874:
- Fully-qualified scopes (\App\Models\User::method() or
App\Models\User::method()) were left parked as unresolved: the class
lookup keyed on the full scope text, which never matches a class
node's own unqualified label. Now normalizes to the last namespace
segment before lookup.
- Method names were matched case-sensitively even though PHP method
calls are case-insensitive; a call spelled with different case than
the declaration silently produced no edge. The lookup key is now
lowercased on both sides.
- A lowercase-first class name (legal PHP, just non-PSR) fell through
the `receiver[:1].isupper()` gate into "dynamic scope" and was
dropped entirely. The gate is now `not receiver.startswith("$")`,
since a `$var::` scope is the only case actually requiring the
declared-type table this resolver doesn't have.
rikurunico
7ed0e1d70a