Allow to use first run simulations for subsequent runs of a given element space

[pedrobcst]

Currently, everytime the analyze function is ran (even if the same paremeters), Xerus will re-simulate, re-query the database. This can be time consuming, and actually makes the sometimes needed iterative process of hyperparameter tuning (ie, g, delta, n_runs, provider settings and so on) time consuming. In light of this problem, the following changes are needed:

• After the first run, keep track of the already simulated patterns / correlations. (should be almost there..)
• If this simulations already exist, use them instead of re simulating / re - querying
• Keep a 'safe' information of simulations / structures that can always be accessed to be used for filtering purposes

[pedrobcst]

Also, It would be benetifial if we could pre-simulate the simulations for viz purposes only, so the pre simulated + correlation calculation can be used (for example in the Streamlit interface) before running the full analysis. Sometimes this is enough to get a good idea what is in the sample. This pre run of simulation+correlation, should be carried over then if analyze is run, it will use this pre-simulated data.