Merge partial overrides over the defaults into a complete config.
Out-of-range values are rejected here rather than silently producing a manager
that never recalls anything (a threshold above 1) or prunes every memory (a
negative budget fraction). Mirrors the Python library's startup validation.
Merge partial overrides over the defaults into a complete config.
Out-of-range values are rejected here rather than silently producing a manager that never recalls anything (a threshold above 1) or prunes every memory (a negative budget fraction). Mirrors the Python library's startup validation.