[1sjp]

Summary

• route NoName context packets through note-aware retrieval so active structured notes can expand recalled memory
• expose noteContext in context source stats for debugging
• add context builder coverage for active-note expansion and archived-note isolation
• update planning docs to reflect B4 second-round progress

Verification

• cargo fmt
• git diff --check
• cargo test noname_context_builder -- --nocapture
• cargo test noname_memory_manager -- --nocapture
• cargo test noname_ -- --nocapture