chore(ci): add govulncheck, staticcheck, go vet, gofumpt gates

* Add lint/format checks to the Gitea release workflow and Makefile
  (targets: vet, fmt, fmt-check, staticcheck, govulncheck, check)
* Switch .golangci.json formatter from gofmt to gofumpt (extra.group-params)
* Bump golang.org/x/text 0.37.0 -> 0.39.0 for GO-2026-5970; re-vendor
* Fix staticcheck S1011 in pkg/diff; drop unused pgsql writer helpers
* Fix gocritic unnamedResult (pkg/diff) and rangeValCopy (pkg/pgsql)
* Apply gofumpt + goimports formatting across the tree

vendor/golang.org/x/sys/cpu/cpu.go

@@ -152,13 +152,17 @@ var ARM struct {
 // The booleans in Loong64 contain the correspondingly named cpu feature bit.
 // The struct is padded to avoid false sharing.
 var Loong64 struct {
-	_         CacheLinePad
-	HasLSX    bool // support 128-bit vector extension
-	HasLASX   bool // support 256-bit vector extension
-	HasCRC32  bool // support CRC instruction
-	HasLAM_BH bool // support AM{SWAP/ADD}[_DB].{B/H} instruction
-	HasLAMCAS bool // support AMCAS[_DB].{B/H/W/D} instruction
-	_         CacheLinePad
+	_              CacheLinePad
+	HasLSX         bool // support 128-bit vector extension
+	HasLASX        bool // support 256-bit vector extension
+	HasCRC32       bool // support CRC instruction
+	HasLAMCAS      bool // support AMCAS[_DB].{B/H/W/D}
+	HasLAM_BH      bool // support AM{SWAP/ADD}[_DB].{B/H} instruction
+	HasLLACQ_SCREL bool // support LLACQ.{W/D}, SCREL.{W/D} instruction
+	HasSCQ         bool // support SC.Q instruction
+	HasDBAR_HINTS  bool // supports finer-grained DBAR hints
+
+	_ CacheLinePad
 }
 
 // MIPS64X contains the supported CPU features of the current mips64/mips64le
@@ -232,6 +236,7 @@ var RISCV64 struct {
 	HasZba            bool // Address generation instructions extension
 	HasZbb            bool // Basic bit-manipulation extension
 	HasZbs            bool // Single-bit instructions extension
+	HasZbc            bool // Carryless multiplication extension
 	HasZvbb           bool // Vector Basic Bit-manipulation
 	HasZvbc           bool // Vector Carryless Multiplication
 	HasZvkb           bool // Vector Cryptography Bit-manipulation