Tracker: Memory v2.3.0 #5273

Summary

Tracks the memory server work that ships in v2.3.0.

Sub-issues

• memory: say when to use read_graph, search_nodes and open_nodes in their descriptions #5202 memory: say when to use read_graph, search_nodes and open_nodes in their descriptions
• memory: add_observations stores a repeated observation twice when it appears twice in one call #5201 memory: add_observations stores a repeated observation twice when it appears twice in one call
• memory: README does not state the search_nodes query length limit #5200 memory: README does not state the search_nodes query length limit
• memory: create_entities, create_relations and add_observations could declare idempotentHint: true #5153 memory: create_entities, create_relations and add_observations could declare idempotentHint: true
• memory: safer persistence defaults, atomic writes, quotas, redaction, and destructive-operation guardrails #4117 memory: safer persistence defaults, atomic writes, quotas, redaction, and destructive-operation guardrails
• Add lightweight read modes #3953 Add lightweight read modes