Record repository relocation and original ground-target investigation

docs/machine-gun-ground-validation.md

@@ -39,17 +39,68 @@ reward; this run wrote `.reference/machine-gun-ground.json` outside Git.
 Package PNG/WAV decoding remains covered by the separate mod validator; this
 collision test loads the actual definitions, logical canvases and Rhai sources.
 
+The October 11 follow-up expands that check to all 110 distinct non-boss ground
+enemy definitions referenced by the 27 original maps, plus those five Iron
+Coast units. All 115 can take damage from the default guns. The original ten
+cases still require destruction and the exact reward. Additional cases require
+damage, rather than treating disappearance as a kill: moving units can escape,
+and the deliberately aggressive secret enemies can kill a starter pilot. Of
+the 115 range cases, 91 were actually destroyed. Four needed a second ordinary
+input strategy: a closer firing lane with movement lead. The report retains
+both attempts. This proves collision eligibility, not that an unequipped pilot
+can defeat every original enemy from a stationary firing lane.
+
+Buildings, parked cars and other map props are usually terrain definitions,
+rather than enemies. A separate local test covers every one of the 889 unique
+destructible terrain definitions used by the original maps, with actual health,
+replacement art and rewards. All explode, settle and pay once in the native
+collision window. One definition starts with negative health and therefore
+explodes without a hit, as it does in the classic source. Original terrain
+requires health below zero, rather than exactly zero, before its deferred
+explosion; the follow-up does not change that rule.
+
+Two focused tests cover the reported Bravo Sector waves 6 and 7. They keep each
+complete original layout and advance ordinary simulation steps to the actual
+displayed positions. All 17 destructible occurrences in rows 130 through 149
+are destroyed by default-gun input. Examples in wave 7 include building `1045a`
+at row 143, column 6 (25 health, 100 credits), and small vehicle/debris tiles
+`1040c`, `1040a`, `1040e` and `1040d` (3–5 health). Nearby industrial/fence tiles
+`1045c` through `1045f` remain intact: their original intact and replacement IDs
+are identical, and the classic `TILE_IsHit` deliberately rejects them.
+
+The spawn-path test retains the native tick, placement, dimensions, movement
+and full terrain for the four ordinary early ground emplacements. With capped
+four-pixel mouse movement and the default guns, the wave 6 bonus emplacement
+and turret die at ticks 565 and 648; wave 7's two turrets die at ticks 392 and
+744. All runs retain 75 shield. The report records each original spawn position,
+the first gun-hit coordinates, current logical bounds and prior interpolation
+position. Every first hit is inside the displayed enemy's current bounds;
+interpolation differs by the expected single vertical pixel.
+
+No further native collision defect was reproduced, so this follow-up changes
+tests and documentation only. The original point collision rules, update order,
+terrain delay and deliberately static scenery remain intact. These simulation
+checks do not independently prove every HD image's visible footprint or the
+desktop presentation; the exact reported screenshot would still be useful if
+the player sees a destructible object that differs from these examples.
+
+The detailed JSON reports and original map contact images are local under
+`.reference/ground-investigation/` in the parent project directory, outside the
+Git root. The runtime catalog is tracked in `data/`. Their report variables are
+`RAPTOR_GROUND_REPORT`, `RAPTOR_TERRAIN_REPORT`, `RAPTOR_EARLY_TERRAIN_REPORT` and
+`RAPTOR_EARLY_SPAWN_REPORT`.
+
 Run the portable checks with:
 
 ```sh
 cargo test --locked --test machine_gun_ground --test gameplay
 ```
 
-After campaign package files are stable, run the local original-data check with:
+After campaign package files are stable, run all four local original-data checks with:
 
 ```sh
-RAPTOR_TEST_DATA=../data cargo test --locked --test machine_gun_ground \
-  real_forward_guns_damage_classic_and_iron_coast_ground_units -- --ignored
+RAPTOR_TEST_DATA=../data cargo test --locked --no-default-features \
+  --test machine_gun_ground -- --ignored
 ```
 
 Commands above run from `RustRaptor/`. Set the usual local SDL library path