feat: add CLI falsifiers and exit tables to thirteen rigging examples

[TMHSDigital]

Summary

Phase 9, retrofit batch 3. Thirteen rigging / constraint / transform / mesh-attribute examples. Each flag feeds degenerate input into an existing assertion. Default smoke path is unchanged. README exit tables document every nonzero code the script already returned; no codes were renumbered.

--same-axis / --flat-source / #141 / #142 shape. Not skip-flags, path selectors, or second witnesses. No substitutions.

Parent of this branch is main @ adf9ace (v0.59.0), after squash-merge of #142 (fdaf467).

Example	Flag	What it changes	Lands at
armature-bend	--zero-curl	pose bones stay at rest; tip-deflection gate still runs	8
damped-track-aim	--mute	mute every DAMPED_TRACK; unmute check still runs	7
driver-wave	--flat-expr	Z-scale expression is 1.0; wave_scale closed form still asserted	3
parent-inverse-orrery	--skip-mpi	parent without matrix_parent_inverse; orbit closed form still asserted	6
shape-key-blend	--zero-blend	Tall.value = 0; 0.5 closed form still asserted	5
vertex-weight-limit	--skip-limit	no 4-influence prune; cap check still runs	4
prop-origin-transform	--skip-mpi	accessory parented without MPI restore	8
gltf-skin-roundtrip	--no-skins	export_skins=False; disk skin count still 1	5
temp-override-join	--no-override	object.join with no temp_override	3
depsgraph-export	--unevaluated	apply_modifiers=False; export still must equal evaluated	5
attribute-domain-shear	--no-overwrite	POINT hub written once; last-write-wins still asserted	5
color-attribute-wheel	--point-domain	POINT-domain color attr; CORNER still asserted	5
soccer-ball-goldberg	--invert-bind	swap pent/hex material slots; class binding still asserted	13

depsgraph-export

--obj is a path selector and was left alone. --unevaluated calls wm.obj_export(..., apply_modifiers=False). The depsgraph still measures the SUBSURF mesh; the OBJ is the 8-vert cage; existing exported != eval_vcount returns 5.

temp-override-join

--no-override calls bpy.ops.object.join() with no fabricated context. A RuntimeError from poll() is caught so it is not FATAL 1; check() then sees three remaining mesh objects and returns 3. The assertion is the existing object-count gate.

catalog.json was not modified. Falsifiers are not on the default smoke path.

Live-run table

Binaries (each --version from that exe):

Tag	Path	Reports
4.5.11	.scratch/blender-4.5.11-windows-x64/blender.exe	Blender 4.5.11 LTS 4db51e9d1e1e
5.1.2	.scratch/blender-5.1.2-windows-x64/blender.exe	Blender 5.1.2 ec6e62d40fa9
5.2.1	.scratch/blender-5.2.1-windows-x64/blender.exe	Blender 5.2.1 LTS 9e2066aef7ef

Check-only (no --output). Observed exit codes were identical on all three binaries.

Example	Flag	4.5.11 def	4.5.11 flag	5.1.2 def	5.1.2 flag	5.2.1 def	5.2.1 flag
armature-bend	--zero-curl	0	8	0	8	0	8
damped-track-aim	--mute	0	7	0	7	0	7
driver-wave	--flat-expr	0	3	0	3	0	3
parent-inverse-orrery	--skip-mpi	0	6	0	6	0	6
shape-key-blend	--zero-blend	0	5	0	5	0	5
vertex-weight-limit	--skip-limit	0	4	0	4	0	4
prop-origin-transform	--skip-mpi	0	8	0	8	0	8
gltf-skin-roundtrip	--no-skins	0	5	0	5	0	5
temp-override-join	--no-override	0	3	0	3	0	3
depsgraph-export	--unevaluated	0	5	0	5	0	5
attribute-domain-shear	--no-overwrite	0	5	0	5	0	5
color-attribute-wheel	--point-domain	0	5	0	5	0	5
soccer-ball-goldberg	--invert-bind	0	13	0	13	0	13

Live-run-proven: the 78 headless invocations (13 × 2 × 3). No falsifier exited 0. No default exited nonzero.

5.1 evidence in this PR body is local, from .scratch/blender-5.1.2-windows-x64/blender.exe. CI 5.1 is the needs-5.1 smoke job on this PR, not this table.

Inspection-only: README table wording vs return N in each script; remaining-count arithmetic (Phase 6's 41 − 6 − 10 − 13 = 12). Did not restyle prior batches or bake-normal-high-to-low. Did not touch pathology/sidecar five, catalog.json, VERSION, CHANGELOG.md, release.yml, blender-smoke.yml, pages.yml, gallery assets.

Test plan

• Default = 0 and falsifier = documented code on 4.5.11, 5.1.2, 5.2.1 (local, table above)
• PR smoke 4.5 + 5.2 (default path; no falsifier flags)
• PR smoke 5.1 via needs-5.1
• Validate + drift-check
• Do not merge from this session

Remaining no-falsifier pool

12 of 55 — the Phase 10 / batch 4 set.