Trade == A measure of your diplomacy.
By breaking the tree-quota you've most definitely soured relations (above and below ground logging counted) it sounds like. The first couple of trades with elves are usually important for setting out how you mean to go on, due to the low amount of goods they bring which are more easily missed and show a less committed stance to diplomacy, as if you embark as elves or people aligned similarly to elves, they send the usual two animals instead of one im fairly sure based on inter-civ opinions on ethics.
Its a good likelyhood they have already ongoing wars they have commited armies to, or are losing badly to another race why they haven't ambushed you already. You can however force a peace by obtaining tribute from every site linked to that civ's government warring you, which resets relations to positive, even if their ideological stance remains the same. Trying this with goblins shows that across 3 seasons of delivering tribute, they can slip from +positive relations back to hostility, no caravans and war just for ideological and babysnatching activities, possibly resetting the intensity of sieges.
I had 1500 logs after making charcoal for a year and also using a good number of logs for walls, floors, 240 beds and hundreds of wheelbarrows because I forgot a carpenter workshop set to repeat, so yeah I must have broken the quota. I just designate large areas for logging to save fps and leave the logs.
I think I only had 1 successfull trade with the Elves. Then I tried maybe twice to trade with them where the Elves got angry and left because of shell-decorations and after that I simply ignored the Elven caravan.
The Elven diplomat also just showed once, so it sorta looks like if you ignore the caravan, then the diplomat ignores you as well?
My civ seems to be allied to a lot of Elves in a big war aganst a goblin civilization. It might be the trading Elves are part of this alliance? Maybe this makes them cool with my destruction of the trees.
Even so, if they have no soldiers to spare, I'd still expect the diplomat to show up and complain.