docs: the 12 duplicates deleted; README rewritten to the system as it is

Captain Bob's rulings, 2026-10-14: "delete" -- the duplicates listed in
DELETE-CANDIDATES.md are removed (the list stays as the record; the
formal tier's provenance comments repointed at the maintained copies) --
and "rewrite" the README: v2.1.0, the Tripod as Hera/Artemis/Hestia,
kernel-Hermes, identities on thumbdrives, the corrected ACL overhead,
1052-test POST and the current parity line, keyboards and storage, board
images carrying both systems and how to switch, and docs/README.md as
the way in.  The book is left as it is, to be reworked later.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/DELETE-CANDIDATES.md

@@ -1,7 +1,9 @@
 # docs/DELETE-CANDIDATES.md
 
-**Listed:** 2026-10-14 (docs triage). **Status:** awaiting Captain Bob's ruling -- nothing here has
-been deleted (docs/CLAUDE.md: never delete without confirmation).
+**Listed:** 2026-10-14 (docs triage). **Status: deleted 2026-10-14 on Captain Bob's ruling
+("delete").** The list is kept as the record of what was removed and why; nothing is awaiting a
+ruling now. The formal tier's `%% SOURCE:` comments that named two of these were repointed at
+the maintained copies.
 
 Every one is a duplicate: either byte-identical to another file in the same archive, or an older
 copy of a document whose maintained copy is named in the reason. Deleting them loses nothing.
@@ -24,4 +26,3 @@ an AI session note -- are no longer in the tree: they were removed at some point
 | `docs/working/archive/legacy/phase-1/Reference/physics_experiment/PEER_REVIEW_SUBMISSION/03_EXPERIMENTAL_DATA/full_90_run_comprehensive/run_logs/test_matrix.txt` | Byte-identical to the same file in ../../../full_90_run_comprehensive/run_logs/. |
 | `docs/working/papers/ONTOLOGY.md` | Older copy (v1.0) of docs/reference/ONTOLOGY.md (v1.1, 2026-08-13). |
 
-To act: "delete the delete candidates", or name the ones to keep.