chore: upgrade declscope to 0.13.1 and adopt declscope shrink

[mpyw]

Summary

Change	Detail
Version bump	declscope 0.12.0 → 0.13.0 in mise.toml. CI installs it through jdx/mise-action, so there is no other pin
Skill update	.claude/skills/declscope-adoption/ reinstalled from the 0.13.0 binary (declscope skill install -agent claude-code -f)
Migration edits	None needed. main was already on 0.12.0, and the 0.13.0 analyzer reports nothing on the unchanged tree
shrink adoption	32 declarations unexported, 1 kept with a reason (below)
CI	declscope shrink ./... runs before declscope ./... in the declscope job

shrink results

Item	Count	Detail
Unexported by shrink -fix	32	8 packages: cli/commands, config, db, executor, js, mock, server, server/body
Crossings stated	9	One //declscope:package each, with a "Shared on purpose: <file>.go (<func>) ..." line in the doc comment, as the rest of the repo does
Ignores added	1	commands.Version: .goreleaser.yaml sets it with -X, which names it by its exported path. shrink offered no fix for it
Not judged	0	shrink printed no not judged line

Crossing stated	Used from
executor.compileTransforms, executor.compileMock	mutation.go (NewMutationExecutor), query.go (NewQueryExecutor)
js.newReadonlyHeaders	request.go (newRequest)
js.newWritableHeaders	response.go (newResponse)
js.newRequest, js.newResponse	apply.go (NewTransformContext)
js.errJSTimeout	apply.go (runCallable), pool.go (PooledVM.Call)
mock.ValueParser.parse	csv.go (parseCSVReaderWithOptions)
body.errBadRequest	form.go, json.go

Doc comments that still named a renamed declaration by its old name were fixed by hand. This includes the core-file notes in config.go and body/parser.go, which listed config.Parse and body.MaxBodySize as the package's API.

Note

server.QueryHandler and server.MutationHandler are now unexported types. NewQueryHandler and NewMutationHandler stay exported, because the e2e tests call them. They now return *queryHandler / *mutationHandler. This is valid Go, and the e2e tests use only the handlers' methods, but it is worth a look.

CI change

Order	Step in the declscope job
1	new declscope shrink ./...
2	declscope ./...

shrink goes first because a declaration it unexports becomes private to its file's namespace. A use from another file is then a boundary crossing that the analyzer reports.

Verification

Check	Result
gofmt -l .	empty
go build ./...	pass
go vet ./..., and with each driver tag (postgres, mysql, sqlite, mssql, mock)	pass
declscope shrink ./...	exit 0
declscope ./...	clean
golangci-lint run ./... (2.13.1)	0 issues
go test -race ./internal/... and ./e2e/...	pass
actionlint v1.7.7 on test.yml	pass (release.yml has shellcheck findings that were already there on main)

🤖 Generated with Claude Code

https://claude.ai/code/session_01KtUXCXiWE99YCb9ZcLmSsn

[codecov]

Codecov Report

❌ Patch coverage is 79.31034% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.90%. Comparing base (00a765b) to head (2d4b931).

Files with missing lines	Patch %	Lines
internal/cli/commands/app.go	0.00%	4 Missing ⚠️
internal/executor/executor.go	42.85%	4 Missing ⚠️
internal/server/body/form.go	50.00%	2 Missing ⚠️
internal/executor/mutation.go	66.66%	1 Missing ⚠️
internal/executor/query.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #42   +/-   ##
=======================================
  Coverage   82.90%   82.90%           
=======================================
  Files          38       38           
  Lines        1685     1685           
=======================================
  Hits         1397     1397           
  Misses        288      288           

Files with missing lines	Coverage Δ
internal/config/config.go	86.66% <100.00%> (ø)
internal/config/error.go	94.56% <ø> (ø)
internal/config/types.go	90.19% <100.00%> (ø)
internal/db/db.go	75.00% <100.00%> (ø)
internal/executor/compile.go	100.00% <ø> (ø)
internal/js/apply.go	90.36% <100.00%> (ø)
internal/js/headers.go	91.57% <100.00%> (ø)
internal/js/pool.go	92.68% <100.00%> (ø)
internal/js/request.go	100.00% <100.00%> (ø)
internal/js/response.go	100.00% <100.00%> (ø)
... and 16 more

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.