MAINT-21: tests read and patch the Controller through tools/main_files.py

Prepares the split of app/main.py's Controller into files by job, with no app
change. tools/main_files.py gives a test the text and the AST of main.py plus
the files split from it, and `live`, which sets a global in every file whose
functions read it (and raises when none does). Tests that read main.py's
source, and tests and replay tools that patch a main global (datetime,
compute, resolve, _mono, WRITE_BUDGET_S, ...), go through it, so they pass on
this layout and on the split one. test_split_patches.py fails when a test or
tool patches an app.main attribute that main.py no longer reads, or that
another file also reads. tools/maint21_same_ast.py proves every function,
method and module-level assignment of main.py at the base is found unchanged
in its new file.

Co-Authored-By: Claude <noreply@anthropic.com>

goodwe_controller/test_pv.py

@@ -692,7 +692,13 @@ def touches(src: str) -> bool:
         or "from .pv import" in src
 
 
-_touch = sorted(f.name for f in APP if touches(f.read_text(encoding="utf-8")))
+sys.path.insert(0, str(HERE / "tools"))
+import main_files  # noqa: E402
+
+# MAINT-21: the files split from app/main.py are counted as main.py.
+_SPLIT = set(main_files.files()) - {"main.py"}
+_touch = sorted({"main.py" if f.name in _SPLIT else f.name for f in APP
+                 if touches(f.read_text(encoding="utf-8"))})
 print(f"    {len(APP)} modules under app/; TEL-11 material is in: {_touch}")
 check(f"PRECONDITION: the scan found the whole package, not a subset - "
       f"{len(APP)} modules", len(APP) >= 25 and "control.py" in