Full Recalc Bugfixes, Logging & FIRST/LAST quality of life updates

• Fixes #95 by fixing restrictiveness level for RollupEvaluator

• Tweaks for #88 to fully support automated pipeline

• Updating batch method to properly intake RollupInvocationPoint

• Fix Apex issue where not all code paths were setting CalcItem__c on Rollup__mdt synthetic records

• Added baseline logging and new RollupControl__mdt.IsRollupLoggingEnabled__c field to toggle on/off. In particular, there's an emphasis on providing information in two parts - the "gathering" phase of Rollup, before it goes async, and the "acting" part of Rollup, with information about each parent-level item being rolled up. This toggle should only be enabled while testing, as it will balloon your debug log size and negatively impact performance.

• patched holes in current RollupCalculator functionality for full recalculation routes that weren't already covered (so, everything besides average/first/last)

• Added baseBaseCalculation method in RollupCalculator to deal with the possibility of rollups where the evaluator filters out all calc items necessitating a full recalc - which would not have happened for String and Number-based rollups previously

• Fixes #97 by properly handling unwriteable fields in recursive check

• Thanks to @mickster04, who added safe guards when migrating from DLRS (#98)