Fix subdir guard, qpe cache, migrations. Support latest claude code

[TensorTemplar]

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[github-actions]

📊 Slopometry QPE Report

QPE Score: 0.2311

Metric	Value	Description
MI (normalized)	0.291	Maintainability Index / 100
Smell Penalty	0.273	Weighted code smell deduction
Adjusted Quality	0.231	MI × (1 - smell_penalty) + bonuses

Code Smell Breakdown

Smell	Count
inline import	221
orphan comment	165
dict get with default	43
swallowed exception	31
single method class	24
passthrough wrapper	9
untracked todo	4
hasattr getattr	4
test skip	3
type ignore	2

Higher QPE = better quality