Official "invitations" to the first round countries (PL, CZ, SK, HU) were issued around 1997 -- but that's the last step in the process. Official "talks" began much sooner. Already the formation of Visegrád Group in 1991 (whose purpose was largely to get these countries ready to integrate into the EU and NATO).
Anyway by 1993 talk of these countries joining NATO was already all over the news (NYT: "Yeltsin 'Understands' Polish Bid for a Role in NATO").
So right there -- you're way off base. The Founding Act itself it pretty long-winded, but I'm not seeing any text that "greenlights" NATO expansion (other than by simply not mentioning the topic).
As to conspiracy theories: the whole point is, what you were referring to was a certain line of (dubious) argumentation or reasoning -- "relying on snippets of facts". Which is certainly very often an aspect of conspiracy theories, but nothing to do with the key substance of the term.
No one (except fully deluded Russian apologists by this point) believes in that particular theory you cite. I certainly don't, and don't feel I need to respond to any ridiculous insinuations that I do.
Anyway, look -- you're certainly quite adept yourself at pulling up snippets of fact. But across the board -- I'm just finding your thinking to be rather muddled; you extremify and hyperbolize a lot; and that you're just not seeing the forest for the trees (in addition to getting a lot of the "trees" themselves wrong). And as a result, this discussion just isn't very productive.
So I'm going to have to bow out at this point, and let you hash these topics over in the privacy of your own thoughts. Which is a pity, sort of (since it seems we would probably agree on a lot of basic things about this conflict that other people seem to be horribly confused about -- such as who the aggressor is, and why they started it).
But at the end of the day -- not really.