PY_ALL_PY is derived from PY_SRC_PY, which wildcards *.py in the module
directory, so a checked-in __init__.py enters the install list
unconditionally. PY_INSTALL_INIT_PY only gates the later append of
__init__.py, which covers files generated at build time. Setting it to
false thus had no effect on an existing __init__.py, which was still
installed together with its .pyc.
Filter __init__.py out of PY_ALL_PY. When PY_INSTALL_INIT_PY is true,
the existing append adds it back, so generated and checked-in
__init__.py files are installed as before. When it is false, an
existing __init__.py is now excluded from PY_ALL_PY and therefore also
from PY_INSTALLED_PY and PY_PYC.
Assisted-by: unsloth/Qwen3.8-27B-GGUF:Q4_K_M with pi.dev v0.84.2
Signed-off-by: Jan Lindemann <jan@janware.com>