Graphify Fortran extractor: incomplete cpp #include hardening allows arbitrary host-file read/exfiltration when indexing an untrusted repo
## Summary The Fortran extractor's C-preprocessor step (`graphify/extractors/fortran.py`, `_cpp_preprocess`) applies an incomplete `#include` hardening. The `-nostdinc -I /dev/null` flags it relies on (comment "Security (F-007)") do **not** stop a capital-`F` Fortran source file from including **absolute paths** (`#include "/etc/passwd"`) or from **path-traversing out of the corpus** (`#include "../../../../home/victim/.ssh/id_rsa"`). `cpp` always searches the directory of the file being preprocessed for quoted includes and always honours absolute include paths, regardless of `-nostdinc`/`-I`. As a result, indexing an untrusted repository th
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