My thinking is that the energy that got absorb in other processes such a photosynthesis is a delayed release.
The energy released must have some time delay. Maybe it all averages out overtime.
Difficult problem I wonder if it is worth answering.
With a brief, 60 million year time frame exception during the Carboniferous, though, the energy stored in life processes is a wash. Assembly and decay are a net balance, and life itself is a strong driver of entropy, so I wouldn't be surprised at all if, on the whole, the biosphere is a net energy sink.
Of course we want to get into the details. I can see there are many reasons why the earth maybe releasing more than it absorbs.
...and this is why I like posting here!
I did find a reference to heat loss from the Earth itself- 87 milliwatts per square meter. Core solidification is slower than I remembered, about 1cm/1k years.