Add tech debt baseline snapshot generator and baseline docs (#1743)

* Add cruft baseline snapshot

* pr feedback

* rename cruft to tech deb

* improve baseline

docs/maintenance/tech-debt-baseline.md

@@ -0,0 +1,26 @@
+# Tech Debt Baseline Snapshot
+
+Generated from `package.json` workspaces. This file is intended as an immutable baseline for cleanup PRs.
+
+## Top 10 largest workspaces by source-file count
+
+- `app` (401 source files, 152 deps)
+- `circuits` (294 source files, 51 deps)
+- `contracts` (242 source files, 54 deps)
+- `packages/mobile-sdk-alpha` (145 source files, 49 deps)
+- `common` (119 source files, 47 deps)
+- `packages/mobile-sdk-demo` (66 source files, 56 deps)
+- `sdk/core` (19 source files, 26 deps)
+- `sdk/qrcode-angular` (14 source files, 37 deps)
+- `sdk/qrcode` (13 source files, 40 deps)
+- `scripts/tests` (2 source files, 0 deps)
+
+## Workspaces with no `test` script
+
+- None
+
+## Workspaces with unusually large dependency sets
+
+- Threshold: >= 85 total dependencies (mean + 1σ, minimum 50).
+- `app`: 152 total (90 deps, 62 devDeps, 0 peerDeps)
+