Fix 3 bugs in EOT shape database

[Copilot]

Three bugs in eot_shape_database.py and its test file — incorrect return type, array dimension mismatch, and a misapplied decorator.

Changes

• sample_within() return type (eot_shape_database.py:58): Was returning np.array(points) — an object array of Shapely Point instances. Fixed to np.array([(p.x, p.y) for p in points]), matching the behavior of the already-correct sample_on_boundary().

• Dimension mismatch in compute_visibility_polygon() (eot_shape_database.py:108): np.array(point.coords) yields shape (1, 2) not (2,). Subtraction with a (2,) vertex silently broadcast, producing a (1, 2) direction vector passed to Point(...) as the far-away point.

  # Before (broken)
  direction = np.array(vertex) - np.array(point.coords)    # shape (1, 2)
  # After
  direction = np.array(vertex) - np.array(point.coords[0]) # shape (2,)

• @classmethod on setUp() (test_eot_shape_database.py:59): setUp is a per-instance lifecycle method; the decorator caused it to receive the class as self, setting starfish as a class attribute and silently breaking test isolation. Removed the decorator.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ COPYPASTE	jscpd	yes		no	no	6.98s
✅ JSON	prettier	2	0	0	0	0.39s
✅ JSON	v8r	2		0	0	2.79s
✅ MARKDOWN	markdownlint	1	0	0	0	0.64s
✅ MARKDOWN	markdown-table-formatter	1	0	0	0	0.2s
✅ PYTHON	bandit	247		0	0	3.05s
✅ PYTHON	black	247	0	0	0	4.34s
✅ PYTHON	flake8	247		0	0	1.69s
✅ PYTHON	isort	247	2	0	0	0.48s
✅ PYTHON	mypy	247		0	0	4.01s
✅ PYTHON	pylint	247		0	0	68.41s
✅ PYTHON	ruff	247	2	0	0	0.04s
✅ REPOSITORY	checkov	yes		no	no	21.71s
✅ REPOSITORY	gitleaks	yes		no	no	3.9s
✅ REPOSITORY	git_diff	yes		no	no	0.04s
✅ REPOSITORY	secretlint	yes		no	no	6.0s
✅ REPOSITORY	syft	yes		no	no	2.81s
✅ REPOSITORY	trivy-sbom	yes		no	no	1.78s
✅ REPOSITORY	trufflehog	yes		no	no	16.87s
✅ YAML	prettier	4	0	0	0	0.5s
✅ YAML	v8r	4		0	0	5.03s
✅ YAML	yamllint	4		0	0	0.43s

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