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>

services/webhook/wechatwork.go

@@ -86,8 +86,8 @@ func (wc wechatworkConvertor) Push(p *api.PushPayload) (WechatworkPayload, error
 		}
 
 		message := strings.ReplaceAll(commit.Message, "\n\n", "\r\n")
-		text.WriteString(fmt.Sprintf(" > [%s](%s) \r\n ><font color=\"info\">%s</font> \n ><font color=\"warning\">%s</font>", commit.ID[:7], commit.URL,
-			message, authorName))
+		fmt.Fprintf(&text, " > [%s](%s) \r\n ><font color=\"info\">%s</font> \n ><font color=\"warning\">%s</font>", commit.ID[:7], commit.URL,
+			message, authorName)
 
 		// add linebreak to each commit but the last
 		if i < len(p.Commits)-1 {