[1sjp]

Summary

• add chapter-scoped episodic memory lookup for NoName memory store
• let NoNameMemoryManager build chapter compaction input from current events and structured notes
• skip archived notes by default to avoid repeated long-term compaction
• add tests for chapter compaction input construction and structured note summary fields
• update planning docs for B4 third-round progress

Verification

• cargo fmt
• git diff --check
• cargo test noname_memory_manager -- --nocapture
• cargo test noname_memory_compaction -- --nocapture
• cargo test noname_memory_store -- --nocapture
• cargo test noname_ -- --nocapture