Strategy interface design epic

[TimDaub]

There are currently a couple of structural or architectural issues we're facing with our strategies as it currently stands. To highlight that we may be better off making progress by focusing on fixing those, I'm collecting them in this issue.

• we want to implement Extract Transform Load, but load doesn't exist yet.
• we tend to use extractor strategies for filtering or for access files (because we cannot do it in onLine of a transformer strategy: https://github.com/neume-network/strategies/pull/234#discussion_r957222148
• https://github.com/neume-network/strategies/issues/236
• https://github.com/neume-network/schema/issues/42
• https://github.com/neume-network/strategies/issues/241
• https://github.com/neume-network/strategies/issues/244
• https://github.com/neume-network/strategies/issues/243
• https://github.com/neume-network/strategies/issues/220
• https://github.com/neume-network/strategies/issues/219
• https://github.com/neume-network/strategies/issues/218
• https://github.com/neume-network/strategies/issues/214
• https://github.com/neume-network/strategies/issues/193
• https://github.com/neume-network/strategies/issues/91
• https://github.com/neume-network/strategies/issues/69
• https://github.com/neume-network/strategies/issues/63
• https://github.com/neume-network/strategies/issues/61
• https://github.com/neume-network/strategies/issues/50
• https://github.com/neume-network/strategies/issues/292
• https://github.com/neume-network/strategies/issues/297
• https://github.com/neume-network/strategies/issues/298

[neatonk]

Here's another one https://github.com/neume-network/strategies/issues/292