[EPIC] Delegate posting of playlogs to Engine Core, rework relevant clock update

See meta#42.

• Update logic based on new metadata update endpoints in Core
• Remove playlog POST from Engine
• Add alternative for fallback state store
• Logic for handling fallback show vs actually scheduled show (inline vs separation)
• Deprecate back-channel implementation
• Update POST clock implementation
• Update config
• Update docs
• Testing

changed milestone to %1.0-alpha2 — Precise Pheasant

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assigned to @david

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marked this issue as related to engine-core#18 (closed)

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marked the checklist item Deprecate back-channel implementation as completed

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marked the checklist item Update logic based on new metadata update endpoints in Core as completed

marked the checklist item Update config as completed

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marked the checklist item Remove playlog POST from Engine as completed

marked the checklist item Update POST clock implementation as completed

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changed title from Delegate posting of playlogs to Engine Core, rework relevant clock update to [EPIC] Delegate posting of playlogs to Engine Core, rework relevant clock update

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marked the checklist item Logic for handling fallback show vs actually scheduled show (inline vs separation) as completed

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closed

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