nx_library_harvest_v2.nx

nx_library_harvest_v2.nx -- ASSIGNMENT D SCALE-UP (tutored): the v1 harvest proved dark->indexed but had two named v1 limits: (1) 20 HARDCODED paths -- new research lands dark again; (2) per-LINE rows -- a query returns a line number, not a document. v2 closes both: a getdents dir-walk (the team's own nx_dirent, same primitive as nx_wall_scan_native) discovers every .md/.txt under the knowledge dirs, and each document becomes ONE row (newlines flattened to spaces) so rowid == docid; a DOCMAP file (line i = path of docid i) makes every query result name its document. Index + docmap persist to knowledge/index/ -- DURABLE, not /tmp (the Archivist reboot lesson: /tmp artifacts died; knowledge/ survives). Gate: row count must EQUAL docmap count (the alignment invariant), and a dark term must be queryable from the RELOADED on-disk index with its rowids in docmap range. Subdirectory recursion (knowledge/library/mirror/) = the next rung, skipped via d_type. license_tier: ORIGINAL