Sorry. Nowhere in what you quoted from Trent does it say that "only the sacrament gets us to heaven." It says that the Sacrament of Baptism is necessary for salvation.
Heaven = salvation. Baptism = necessary for salvation/heaven. Same thing.
The word "salvation" can mean salvation from eternal Hell, but with a detour through Purgatory first.
Ok, but Purgatory is not an eternal place; it ends when the world ends. Thus, there are only 2 "ending spots" - heaven or hell.
a. If you are saved from hell, you necessary end up in heaven. You just described it indirectly. "Saved from hell" = "Saved in Heaven" = "Salvation in Heaven".
b. Detour in Purgatory = you end up in Heaven. Salvation = heaven.
Or it can mean salvation from all punishment in the afterlife, meaning no Purgatory.
So no purgatory = go directly to heaven. Salvation = Heaven.
I believe that Canon V is using "salvation" in the second sense. Trent does not specify, so we just don't know from Canon V itself, which sense was intended.
First sense or second sense...it doesn't matter. The end result is Heaven. Salvation = Heaven.
I've never heard anyone try to say these 2 words mean different things. "Salvation" is the process or adverb which describes one getting to heaven. But the word is solely connected to heaven. You only get saved to go to heaven (eventually); no where else. If someone attains salvation, they attain heaven. They are 100% related.
1. The sacrament = necessary for salvation = necessary for heaven.
2. BOD is not the sacrament.
3. BOD cannot provide salvation in heaven. (Purgatory is irrelevant because it's temporary).