fix: repair audit-full build and inventory errors

Fix bash 3.2 parser error on escaped space in collect-inventory.sh
(=~ ^require\ ]] -> [[:space:]]). Remove unused Go imports in
cmd/audit/main.go and internal/security/claude.go, and an unused
test variable in osv_test.go so go build and go vet pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GVbEgdgcC1w6qwSq3zC4kg

cmd/audit/main.go

@@ -1,12 +1,10 @@
 package main
 
 import (
-	"encoding/json"
 	"flag"
 	"fmt"
 	"log"
 	"os"
-	"path/filepath"
 
 	"github.com/user/package-review/internal/inventory"
 	"github.com/user/package-review/internal/report"

internal/security/claude.go

@@ -3,7 +3,6 @@ package security
 import (
 	"encoding/json"
 	"fmt"
-	"os"
 	"os/exec"
 	"strings"
 )

internal/security/osv_test.go

@@ -72,7 +72,7 @@ func TestQueryOSVWithMockedServer(t *testing.T) {
 	// Note: In actual implementation, we'd need to inject the base URL
 	// For now, this test validates the response parsing logic
 	t.Run("parse_valid_response", func(t *testing.T) {
-		pkg := inventory.Package{
+		_ = inventory.Package{
 			Name:    "requests",
 			Version: "2.28.0",
 			Source:  "pip",

scripts/collect-inventory.sh

@@ -105,7 +105,7 @@ for go_mod in ~/go/src/*/go.mod ~/.config/*/go.mod /tmp/*/go.mod; do
     dir=$(dirname "$go_mod")
     if command -v go &> /dev/null; then
       while IFS= read -r line; do
-        if [[ "$line" =~ ^require\ ]]; then
+        if [[ "$line" =~ ^require[[:space:]] ]]; then
           continue
         fi
         if [ -z "$line" ] || [[ "$line" == ")" ]] || [[ "$line" =~ ^\/\/ ]]; then