H-300: wire Captain Skills into Web runtime (#48)

* H-300: wire Captain Skills into Web runtime

* H-300: enforce effective model and conservative skill budget

* H-300: fix CI gosec step

* ci: extend golangci-lint timeout

* fix lint findings across backend

* fix(push): resolve delivery protocol blockers

* test(repository): close SQLite test databases

* test(repository): reuse SQLite schema per package

* H-307: restore backend Go cache in CI

* H-307: prefetch modules before cold lint

* H-307: resolve govulncheck security gate

* H-307: build lint with patched Go toolchain

* H-307: clear remaining security scan findings

---------

Co-authored-by: Rogee <rogee@ipao.vip>

backend/internal/handler/api/v1/captain_task_handler.go

@@ -246,7 +246,9 @@ func captainSetSSEHeaders(c *gin.Context) {
 
 // captainWriteSSEMessage writes a single SSE event to the Gin response writer.
 func captainWriteSSEMessage(c *gin.Context, event string, data string) {
-	c.Writer.WriteString(fmt.Sprintf("event: %s\ndata: %s\n\n", event, data))
+	if _, err := c.Writer.WriteString(fmt.Sprintf("event: %s\ndata: %s\n\n", event, data)); err != nil {
+		applogger.L().Errorf("write Captain SSE event %s: %v", event, err)
+	}
 }
 
 // captainWriteSSEError writes an error SSE event followed by a done event.