fix(plugin): hook logic bug and version mismatch

- Fix hook exit status check: || → && so failed augment errors
  don't get injected into Claude's context as graph results
- Add exit status check to npx fallback (same bug)
- Update plugin version from 1.2.11 to 1.3.3 in both
  marketplace.json and plugin.json

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude-plugin/marketplace.json

@@ -11,7 +11,7 @@
   "plugins": [
     {
       "name": "gitnexus",
-      "version": "1.2.11",
+      "version": "1.3.3",
       "source": "./gitnexus-claude-plugin",
       "description": "Code intelligence powered by a knowledge graph. Provides execution flow tracing, blast radius analysis, and augmented search across your codebase."
     }

gitnexus-claude-plugin/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "gitnexus",
   "description": "Code intelligence powered by a knowledge graph. Provides execution flow tracing, blast radius analysis, and augmented search across your codebase.",
-  "version": "1.2.11",
+  "version": "1.3.3",
   "author": {
     "name": "GitNexus"
   },

gitnexus-claude-plugin/hooks/gitnexus-hook.js

@@ -112,8 +112,8 @@ function main() {
         ['augment', pattern],
         { encoding: 'utf-8', timeout: 8000, cwd, stdio: ['pipe', 'pipe', 'pipe'] }
       );
-      if (child.status === 0 || (child.stderr && child.stderr.trim())) {
-        result = child.stderr || '';
+      if (child.status === 0 && child.stderr && child.stderr.trim()) {
+        result = child.stderr;
       }
     } catch { /* not on PATH */ }
 
@@ -125,7 +125,9 @@ function main() {
           ['-y', 'gitnexus', 'augment', pattern],
           { encoding: 'utf-8', timeout: 15000, cwd, stdio: ['pipe', 'pipe', 'pipe'] }
         );
-        result = child.stderr || '';
+        if (child.status === 0 && child.stderr && child.stderr.trim()) {
+          result = child.stderr;
+        }
       } catch { /* graceful failure */ }
     }