feat: Full chain streaming prototypes

[DaveSkender]

Description

As the next step in our v3 preview release plan, this implements:

• refactor, simplify quote provider (observable only)
• stabilize full prototypes of the core streaming scenarios
  • feat: Quote in » chain out - ADL #1198
  • quote/chain in » chain out - EMA,SMA
  • feat: Quote-only in » unchainable result out - ATR-STOP #1214
  • quote/chain in » unchainable result out - ALLIGATOR
  • feat: Quote in » quote/chain out - Renko #1206
• refactor: Performance tuning (stream + incr experiments) #1230 for alligator, Renko (general, like EMA, SMA updates)
• perf tuning when using double.IsNaN() over null evaluation (many places)
• retry chainable type or interface over concrete typesto avoid hub type parameter, by de-coupling cache and observable types
  • Remove Reusable type
  • Remove TQuote, use IQuote
• add back reference Date alias that writes to long timestamp, but Date marked as obsolete but replace by complaint name
  • has constructors to take DateTime format
  • has permanent name-compliant calculated property for DateTime
• find and fix other, hidden fixed-period initialization indexes (returned to backlog)
• resolve commented issues (see comments section below)

Problems to resolve

• get full chain observation to work in isolated EMA/SMA base cases, proof of concept for stream through full chains #1096
• refactor to obviate dual cache, and other EMA/SMA performance tuning
  • refactor performance tests to group Static or Stream, remove redundant series tests from stream grouping
  • abstract QuoteObserver, ChainObserver, and generic Cache methods with generic <T> result storage
• handle out-of-sequence late-arrival quotes #1094 - add missing use cases for dispositions Acts, rebuild / cache busting scenarios
  • or, at a minimum, address incomplete OnNext() scenarios and possible allow virtual overriding
• allow non-chainable IResult to be an observable » all result forms should be observable, even if they're not chainable (for comprehensive end-use streaming).
• consider: forcing concrete types for observables, cached quotes; I don't think record struct is going to work well with larger types, and has too many stack copies (stack overflow risks). Allowing TQuote is only problematic on observing and caching; maybe just do a quick transform OnArrival();
  • » KEPT generic TQuote, found most issues were with index lookups; fixed in:
  • feat: Restack stream base classes, fix stack overflow scenarios #1208
  • change forward-cascading updates to use iterative Resend() instead of recursive OnNext()
  • one QuoteProvider with all indicators subscribed (massive parallel)
  • one QuoteProvider with max possible chain depth (massive serial)

Refactor interfaces

• remove all forms to Tuple interfaces. These are no longer needed due to wider use and compatibility to the IReusable interface; further reducing re-writing transforms and memory utilization.
• convert all public class types to record ~struct~ and remove unneeded AbstractResult class. Use of struct type and IObservable has largely limited inheritance options.
  • refactor all uses to "write once", since these are now immutable value types.

Documentation

• update Indicator source taxonomy #1069 for v3, if changed
• update example projects