Update tool dependencies and fix new lint issues (#36702)

## Summary
- Update golangci-lint v2.9.0 → v2.10.1, misspell v0.7.0 → v0.8.0,
actionlint v1.7.10 → v1.7.11
- Fix 20 new QF1012 staticcheck findings by using `fmt.Fprintf` instead
of `WriteString(fmt.Sprintf(...))`
- Fix SA1019: replace deprecated `ecdsa.PublicKey` field access with
`PublicKey.Bytes()` for JWK encoding, with SEC 1 validation and curve
derived from signing algorithm
- Add unit test for `ToJWK()` covering P-256, P-384, and P-521 curves,
also verifying correct coordinate padding per RFC 7518
- Remove dead staticcheck linter exclusion for "argument x is
overwritten before first use"

## Test plan
- [x] `make lint-go` passes with 0 issues
- [x] `go test ./services/oauth2_provider/ -run
TestECDSASigningKeyToJWK` passes for all curves

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Makefile

@@ -15,13 +15,13 @@ XGO_VERSION := go-1.25.x
 AIR_PACKAGE ?= github.com/air-verse/air@v1
 EDITORCONFIG_CHECKER_PACKAGE ?= github.com/editorconfig-checker/editorconfig-checker/v3/cmd/editorconfig-checker@v3
 GOFUMPT_PACKAGE ?= mvdan.cc/gofumpt@v0.9.2
-GOLANGCI_LINT_PACKAGE ?= github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.9.0
+GOLANGCI_LINT_PACKAGE ?= github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.10.1
 GXZ_PACKAGE ?= github.com/ulikunitz/xz/cmd/gxz@v0.5.15
-MISSPELL_PACKAGE ?= github.com/golangci/misspell/cmd/misspell@v0.7.0
+MISSPELL_PACKAGE ?= github.com/golangci/misspell/cmd/misspell@v0.8.0
 SWAGGER_PACKAGE ?= github.com/go-swagger/go-swagger/cmd/swagger@v0.33.1
 XGO_PACKAGE ?= src.techknowlogick.com/xgo@latest
 GOVULNCHECK_PACKAGE ?= golang.org/x/vuln/cmd/govulncheck@v1
-ACTIONLINT_PACKAGE ?= github.com/rhysd/actionlint/cmd/actionlint@v1.7.10
+ACTIONLINT_PACKAGE ?= github.com/rhysd/actionlint/cmd/actionlint@v1.7.11
 
 DOCKER_IMAGE ?= gitea/gitea
 DOCKER_TAG ?= latest