test(gates)!: the size/complexity ratchet leaves the gate; audit_metrics reports it

sourceSize.contract.test.ts, its test kit and backend/tests/test_source_size.py
held 13 FE / 9 BE file ceilings and 64 FE / 32 BE function ceilings. No real
hit (E34 S2/S4): its history is its own birth (751e1ae5), two rounds of
fixes to its own logic (e432dc27, d1df76e8), the snapshot move (182ec311)
and ceiling edits inside feature fixes (5806adda, df4a79a1, and the S2/S3
cuts here). It caught no defect, went red 8 times on its own limits and drew
5 review findings about itself. The numbers stay visible: audit_metrics
reports file size and complexity, and an epic compares before and after.
docs/gates.md: the two size rows go; the C901 row says where it is read now.

docs/development.md

@@ -98,7 +98,7 @@ npm run typecheck     # tsc x3 (app / node / e2e)
 npm run lint          # eslint (typed rules included; warnings fail)
 npm run format:check  # prettier
 npm run knip          # unused files/exports/deps — and unused by what SHIPS (--production)
-npm run test          # vitest (incl. the compiler, size/complexity and gate-register contracts)
+npm run test          # vitest (incl. the compiler and gate-register contracts)
 npx vite build        # the production bundle (devOnlyGuard fails it on dev-only code)
 npm audit --omit=dev --audit-level=high   # what ships to the browser, at high or above
 ```

docs/gates.md

@@ -87,7 +87,7 @@ project checks needs a row.
 | Scope | Narrowed | Why | Measured |
 | --- | --- | --- | --- |
 | backend + scripts | `B008` — narrowed: `fastapi.Depends`, `fastapi.Query` declared immutable | FastAPI's dependency injection IS a call in a default argument, on every route. Every other call in a default still fails. | 474 sites, all of them FastAPI |
-| backend/app | `C901` — not in ruff; measured by `tests/test_source_size.py` | Ruff has no per-function baseline, so turning it on would need a `noqa` per offender, and a `noqa` lets a function grow without limit. The test holds each offender, by name, at its current value. Tests and scripts are outside it: see the size / complexity rows under Lanes. | 32 functions over 10 |
+| backend/app | `C901` — not in ruff; reported by `scripts/audit_metrics.py` | Ruff has no per-function baseline, so turning it on would need a `noqa` per offender, and a `noqa` lets a function grow without limit. Complexity is a number an epic reads before and after (E35), not a gate: the ratchet that held it caught no defect in E32–E34, went red 8 times on its own ceilings and drew 5 review findings about itself. | 32 functions over 10 (E34) |
 
 ## basedpyright (backend)
 
@@ -121,8 +121,6 @@ project checks needs a row.
 | CVE gate | HIGH/CRITICAL with a fix available only | `--ignore-unfixed` + `--severity HIGH,CRITICAL`: a finding with no fix cannot be acted on by an upgrade; it shows in the scan output. A fixable one fails the publish, and the only way past it is `.trivyignore.yaml`. | 0 open (E32 S1) |
 | npm audit | `--omit=dev --audit-level=high` | What ships to the browser, at high or above. The dev toolchain's advisories were burned down by hand in E32 S1 (18 → 0). | 0 |
 | React Compiler | the functions it skips, pinned | `components/compilerCoverage.contract.test.ts` — the list may only shrink. End state: only VirtualGrid (TanStack Virtual, an IncompatibleLibrary) remains. | 93 (E32 S1) → 29 (E32 S3) → 1, VirtualGrid (E32 S4) |
-| size / complexity | today's offenders as ceilings | `src/lib/sourceSize.contract.test.ts`, `backend/tests/test_source_size.py`: listed files and functions may not grow, nothing new may cross the limit, an entry back under it must be deleted. A function is held by its name, not its rank in the file. | files >800 lines: 13 FE / 9 BE; functions over the limit: 64 FE / 32 BE (E32 review) |
-| size / complexity | shipped code only — not tests, test kits, e2e or `scripts/` | The ratchet guards what runs in production. A test file is long because it is a list of cases, and a test kit is test code; splitting either moves lines without making anything easier to change. `scripts/` is release and seed tooling, not in the image. | outside it: tests >800 lines 2 FE / 5 BE; functions over the limit 2 FE test code (`gates.contract.test.ts` `eslintNarrowings` 23, E32 review round 3; `compilerSkips.testkit.ts` 25), 1 BE test (11), 1 script (`e2e_seed.py` `main` 13) |
 
 ## Accepted findings