Remaster 23 classic terrain and structure pictures

Add reviewed native terrain artwork, preserve original detail where required, and validate versioned carried Terrain identities. Bundle the 5407-frame pack for Linux and Windows and record current validation results.

docs/hd-full-review.md

@@ -1,5 +1,9 @@
 # Complete-original HD review
 
+Current artwork/runtime checkpoint — 17 October 2026: the registered and assembled pack contains **5,407 frames / 3,574 complete sequences**, including **4,298 Terrain pictures**. **346 originals remain**: 237 Terrain, 75 enemies/ground objects, 33 UI/other and one boss. Remaining means not approved for HD registration, including held drafts and actual refusals, rather than never generated. The 23 Terrain additions are complete native singletons 40435–40444, 20391–20394, 2057d, 20585 and 20586 across six jobs. Their 21 raw routes comprise 20 copied new payloads and one exact alias of existing 9ce; four hybrid frames retain 118 declared Original logical cells, which are not generated HD. All prior 5,384 bindings and 3,551 full headers remain exact. Actual data contains **9,356 files / 8,245,392,052 bytes**; Root's CLI validates 5,407 frames with zero rejects and 45 mods/one override (`8c9f3893`). Source18 and both executables remain Source C+D from published `a073f73f`, distinct from API-B. Saved context reviews cover 128 current-C cases for 40435–40444 plus 17 ordered pairs, three road contexts and seven hardware contexts (three carried/four changed); 40440 is unused/gallery-only. All six directed cross-group Source intersections are empty within those saved 128/3/7 inputs. This does not establish seamlessness, all placements or full-HD completion. Three actual 5,407 SDL controls at 1080p/HD4x match frozen C5,384 exactly across 6,220,800 RGB/alpha pixels; these controls contain none of the new 23 frames. Source-C native Windows at `a073f73f` passed 379 tests with 26 ignored and zero failures; prior API-B 5,384 evidence (361 passed/26 ignored/zero failed) is separate. The 5,407 Git publication and native Windows execution remain pending. The following 5,384 source-update and older art observations remain dated history.
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+Preserved 17 October 2026 Source-update checkpoint at 5,384 (historical coverage): Current runtime checkpoint — 17 October 2026: Source C+D is remote-confirmed at `a073f73f`, with **5,384 HD frames / 3,551 sequences** and 369 originals still outstanding. Both executables are rebuilt; 90 Rust / 78 Python tests and three fresh 1080p controls pass, with zero pixel differences from API-B. Source C+D native Windows CI remains pending. Historical 8ada, 386e and API-B material/context/QA evidence below retains its recorded epoch; these bounded runtime checks add no artwork or hybrid approval. See [the coordinator checkpoint](hd-coordinator-checkpoint.md) for current validation and Windows attribution.
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 Independent review started **2026-10-10**, extended **2026-10-11**. This is an ongoing acceptance record, separate from the generation jobs and registration coordinator. Full completion requires all **5,753 standalone source picture IDs** to have reviewed, registered remasters and their retained rendering paths to work. Candidate images, queue entries, original fallback and a successful PNG decode do not establish completion.
 
 ## Inventory checked independently