_raw daten waren nur für php-fpm wichtig
das ist buggy und wurde durch pwews abgelöst
damit kann _raw langfristig entfallen!

## PHPEF runtime allowlist and ebuild RDEPEND contract

Implemented in the PHPEF generator path: a top-of-file PHPEF runtime policy in `meson.build.pw`, before `ebin` rules, declares which runtimes are allowed and therefore which runtime packages the ebuild must list in RDEPEND. Syntax:

```text
phpef-runtime-embed = true|false
phpef-runtime-natives = standard,foo,bar  # may be empty to disable native runtimes
```

Implemented behavior:

- parses these global settings in `pw-build-meson`;
- refuses `ebin` lines unless both `phpef-runtime-embed` and `phpef-runtime-natives` were explicitly declared earlier in the file; `phpef-runtime-natives =` is valid and means no native runtime is allowed;
- passes the allowed embed/native runtime set into `phpefc-get-build-pipeline` and `library-embed2native`;
- renders Meson dependencies only for allowed runtimes, keeping ebuild RDEPENDs explicit;
- when `phpef-runtime-embed=false`, adds a post-C/link dependency check for every PHPEF binary target: inspect the final ELF dependency tree (`ldd`/`lddtree`-equivalent) and compile-die if `libphpef-runtime-embed.so` is still required;
- the embed-forbidden compile-die message says that not all required functions have native implementations yet and that `phpef-runtime-embed=true` must be set in `meson.build.pw` if embed fallback is intended.

The native runtime allowlist is also optimizer policy: `library-embed2native` must receive the allowed native runtime set. If it needs/selects a native runtime that is not allowed, it must compile-die and tell the developer to list that native runtime in `meson.build.pw` and the ebuild RDEPENDs.

