we know that Thinkinzar is referred as "the architect" in the gremlin society (it's explained somewhere in missions).
I don't believe this is relevant as razwog is a schemer which, according to Nick, is the equivalent of engineer, so architect might be the equivalent of king.

Don't question it.
Just accept it.

The gremlins act as a sort of maintenance crew for the clockworks. They are considered to be "mechanical geniuses", and Tinkinzar is their king.
Whether or not Tinkinzar is the Architect is another story, but the Spiral Knights believe that he may be the one who envisioned the clockworks.

In the lore, we do not know if Tinkinzar created the clockworks - however us players and most of the knights that we interact with in the game believe the gremlins do indeed have something to do with the clockworks and why it is here. We can only assume Tinkinzar is the mechanical genius who designed the clockworks, but perhaps didn't have the power to make it operate. The core contains an entity which emits great power, so it could very well be an alliance between the core and Tinkinzar that was destroyed at some point.

Honestly, I don't even think it's clear that Tinkinzar is involved with the swarm... The "pact" could have been protection from the entity, and once seeing how powerful that entity was Tinkinzar nope'd out of the contract, leaving the core to have to fight off the swarm on its own. The fact that the clockworks does act as a sort of deathtrap in-of itself is the iron embrace that devours all.

Hopefully we'll get some more sound concrete lore when we get the new Tier 3 boss.

At the beginning, there was a sphere of blue energy, pure and prestine, with dark empty void surrounded its beautiful presence, for reason of perhaps love, or hate. Then the sphere gains a consciousness, the desire to be spread across the universe was its will, it materialized the energy into solid body parts, he called himself, Inceptron. And with his will and the power, he created Cradle.

His plan to spread his influence across the universe is simple, since he cannot move freely, he created creatures smart enough to voyage across the universe. Spreading bits and pieces of himself to other worlds. At first, He created the Almirians, and he designated one of their greatest leader, Lord vanaduke, to be his first 'Architect', the role of an architect is to oversee the construction of cradle, in the time of the Alimirian civilization, Vanaduke oversaw the contruction of five layers of the cradle, but then they stopped. Inceptron, who is dissastified with the progress, decided to drive Vanaduke into insanity and turns him into a monster. With his firey wrath, he destroyed the civilization he once helped to build. Vanaduke is now trapped inside FSC, his prison of eternal sorrow... and rage.

Inceptron took his time, this time started off with the single celled jellies, multicellular wolvers and then the wolvers evolved to walk up right and became what we now know as, the Gremlins. Inceptron appointed Tinkinzar, a distinguished lord to become the next Architect. He is much more successful than Vanaduke, created another 25 layers of new clockwork. But Tinkinzar knew that one day, Inceptron will destroy him once he is no longer useful. So instead of waiting for his inevitable fate, Tinkinzar created the swarm and used it to trap Inceptron inside the the planet's core. Now turning from salve to master Tinkinzar took over control of cradle while ensuring that core is not to be breached.

Trapped inside his prison, Inceptron saw a vision, a vessel out side cradle, he knows that this is his chance to escape. Channeling a powerful beam of energy, he manages to bring the vessel down to the planet side. Now, all he has to do, is to wait for his rescue...

The echo stones are a lie, the spirits are toying with you, Inceptron is coming, and he will destroy all.