enhance(#1579): deterministic gsd-tools query eval.score verb (#1583)

* feat(#1579): deterministic gsd-tools query eval.score verb

Split C of #1573 (pure code, lowest risk). Adds an eval.score query verb
(coverage*0.6 + infra*0.4; bands 80/60/40) mirroring the verify.* chain;
gsd-eval-auditor consumes it instead of doing weighted arithmetic in-prompt.
Non-breaking — additive only.

arXiv: 2601.15130 (Plausibility Trap/DPDM), 2507.10281 (Table Agent), 2508.15754 (TIR).

* fix(#1579): address review — domain guard, property test, glossary, SKIP_ROOT, inventory/baseline

- C3 input-domain: reject out-of-domain eval.score (require 0<=covered<=total; was emitting overall_score>100 / negatives)
- C1 property test: add tests/eval.property.test.cjs (fast-check) — determinism, band monotonicity, [0,100] bounds, never-throws
- C2 glossary: CONTEXT.md "Eval Scoring Module" entry (source-of-truth path + interface)
- C4: add `eval` to SKIP_ROOT_RESOLUTION (pure arithmetic; no .planning/ access)
- inventory: register generated eval.cjs/eval-command-router.cjs (INVENTORY-MANIFEST.json + INVENTORY.md rows)
- size: regen agent-size baseline for gsd-eval-auditor (reused gsd_run shim + eval.score step)
- eslint: ignore generated eval*.cjs (ADR-457 bin/lib migration coverage)

* fix(#1579): register eval family in alias-drift gates

Add EVAL_COMMAND_ALIASES/EVAL_SUBCOMMANDS to scripts/check-alias-drift.cjs
families and to familyArrayKeys in the manifest-coverage test, so the eval
family lands under the same drift guard as every sibling family
(state/verify/init/phase/phases/validate/roadmap). Addresses trek-e review.

check:alias-drift ok; feat-3251 coverage 9/9; eval suites 10/10.

* docs(#1579): use half-open verdict band ranges in CLI-TOOLS

overall_score is fractional and thresholds are >=80/>=60/>=40, so a score
in [79,80) is correctly NEEDS WORK despite the old '60-79' label. Relabel
bands as 60-<80 / 40-<60 / 0-<40 to match the code. Addresses trek-e nit.

* fix(#1579): validate eval.score CLI inputs

Reject unknown infra tokens and fractional counts, and pin the 80-point verdict boundary including rounding-before-banding behavior.

docs/INVENTORY.md

@@ -429,6 +429,8 @@ Full listing: `gsd-core/bin/lib/*.cjs`.
 | `docs.cjs` | Docs-update workflow init, Markdown scanning, monorepo detection |
 | `drift.cjs` | Post-execute codebase structural drift detector (#2003): classifies file changes into new-dir/barrel/migration/route categories and round-trips `last_mapped_commit` frontmatter |
 | `edge-probe.cjs` | Spec-completeness edge probe (compiled from `src/edge-probe.cts`, gitignored) — the first adapter of the `probe-core` resolution model (ADR-550 Decision 7): shape classification, applicable-category relevance filter, edge proposal, and the `{explicit, backstop}` verification validators; delegates merge/rollup/CLI to `probe-core`; exports `classifyShape`, `applicableCategories`, `proposeEdges`, `analyzeCoverage`, `validateResolution`, `TAXONOMY` (#550) |
+| `eval-command-router.cjs` | Routes the `eval.score` verb (compiled from `src/eval-command-router.cts`, gitignored) — thin dispatcher into the eval scoring module (#1579) |
+| `eval.cjs` | Deterministic eval scoring (compiled from `src/eval.cts`, gitignored) — `computeEvalScore` (coverage*0.6 + infra*0.4, bands 80/60/40) + `cmdEvalScore` CLI domain guard; moves the gsd-eval-auditor's weighted arithmetic out of the prompt into code (#10 / #1579) |
 | `fallow-runner.cjs` | Fallow audit adapter for `/gsd-code-review`: binary resolution (`PATH` then `node_modules/.bin`), actionable missing-binary errors, and structural findings normalization |
 | `federated-config.cjs` | Defensive merge of capability-declared config slices into the loadConfig return value — ADR-857 phase 3b; exports `mergeFederatedConfig({ configSchema, isCentralKey, userConfig })` → `{ values, validKeys, warnings }`; live for migrated Capability keys that are atomically removed from the central config schema |
 | `frontmatter.cjs` | YAML frontmatter CRUD operations |