fix(extract): don't flag in-body function-like macro calls as parse gaps (#1071)

[DeusData]

Problem (#1071)

A function-like macro invocation whose argument is a type token — e.g. SYNTH_ALLOC_ARRAY(char, n) — makes tree-sitter's C/C++ grammar emit an ERROR node (it parses char in expression position). cbm_collect_error_regions records that as a parse_partial coverage gap, even though the macro is #defined in the same file and nothing is actually missing from the graph. The reporter found this systematic across an allocation-macro-style corpus (built-in-type first arg: 43/45 invocations flagged; pointer-type: 17/17).

#define SYNTH_ALLOC_ARRAY(Type, Count) ((Type*)std::malloc(sizeof(Type) * (Count)))
Buffer make_buffer(std::size_t n) {
  Buffer b;
  b.data = SYNTH_ALLOC_ARRAY(char, n);   // <- flagged parse_partial before this fix
  ...
}

Fix

Subtract an error region only when it both:

1. contains an invocation NAME( of a file-defined function-like macro (a Macro def that carries a parameter signature), and
2. is fully enclosed by an extracted Function/Method body.

Condition (2) is the important guard. A top-level macro invocation is different — the macro may itself expand to a definition the original span doesn't contain (that's #949, extract_cpp_preproc_macro_generated_callable_skipped), which must stay flagged. Restricting suppression to in-body calls keeps #949 honest and fails safe: a benign top-level call stays flagged rather than a real gap being hidden.

Tests (reproduce-first, RED-verified)

• extract_cpp_functionlike_macro_type_arg_no_false_parse_partial_issue1071 — RED-verified: with the suppression neutralized the file reports parse_incomplete=1, error_ranges=14-14; with the fix it's clean.
• extract_cpp_real_in_body_error_still_flagged_issue1071 — a genuine in-body syntax error (int x = ;, no macro) still reports parse_incomplete — proves the suppression is tight.
• Existing ...issue949 / ...issue946 parse-coverage tests preserved.

Full extraction (253) and pipeline (221) suites pass; lint-ci clean.

Closes #1071.