dream - AddPhaseEnricher & context & search implementations (#1767)

* feat: (dream)add heuristic enrichment for fine-extracted memories

* feat: (dream) add conservative context binding

* feat: (dream) recall context summaries during search

* feat: (dream) register dream plugin.

* feat: (dream) add unit test for recall.

* fix: (dream) tighten feedback signals and diary lookup

* fix: (dream) include context summaries in diary output

* fix: (dream) fix for python 3.10