PHP: (new Service())->method() resolves as EXTRACTED with FQN corroboration

[filipechagas]

Parent

Spec: #1 (upstream: Graphify-Labs#1682)

What to build

An inline instantiation call — (new Service())->method() or (new \\App\\Services\\Service())->method() — gets a calls edge to the service's method. Because the source names the exact class, the edge is EXTRACTED — but only when the source's qualified name corroborates the resolved node; otherwise it downgrades to INFERRED. new self() / new static() receivers are refused.

Extends the tracer's receiver mapping with the (new) receiver key plus the retained class name and qualified text.

Acceptance criteria

• (new \\NS\\Service())->method() yields an EXTRACTED calls edge when the qualified name corroborates the resolved node; decoy gets no edge
• Bare (new Service())->method() resolves; confidence per the corroboration rule
• Non-corroborating qualified name downgrades to INFERRED (or refuses — per spec decision)
• (new self())->m() and (new static())->m() yield no edge
• Anonymous-class instantiation (new class {...})->m() yields no edge
• Bare new Service() statements without an immediate call remain out of scope (unchanged)

Blocked by

• PHP member calls tracer bullet: $this->prop->method() resolves to an INFERRED calls edge #2

[filipechagas]

Implemented in ae95261. Orchestrator gate: full suite 3957/36 (+10 tests). EXTRACTED only under PSR-4 path corroboration of the written namespace; bare/mismatched names stay INFERRED; new self()/static() and anonymous classes refused (anonymous-class AST shape probed on tree-sitter-php 0.24.1, closing design open-risk #3). All three upstream repro scenarios now produce the expected edges.