fix: use cachedmethod instead of cached for methods

[chaen]

cached prevents garbage collection

import functools
import objgraph   # pip install objgraph
import gc


class Foo:
    # This cache is held somewhere in global memory, and prevents Foo objects from being reaped
    @functools.cache
    def func(self, key):
        return key + key

for i in range(10):
    Foo().func(i)


gc.collect()
print(f"Foo: {objgraph.by_type('Foo')}")  # 10 objects

BEGINRELEASENOTES

*Framework
FIX: use cachedmethod instead of cached in ProxyDB

*TS
FIX: use cachedmethod instead of cached in Utilities

ENDRELEASENOTES

[fstagni]

I do not fully understand here:

• your example uses functools.cache, not cachetools.cached
• how did you discover? any reference?
• did you try with the cachedmethod?