fix(doctor): two false-positive/timeout fixes — drift walk skips node_modules; bare-tweet skips inline-code + cited lines (#1772)

* fix(drift): skip node_modules/dist/build in multi-source drift walk

The drift walker recursed into node_modules (50k+ files in RN/Astro repos),
exhausting the time budget before completing, so multi_source_drift always
reported 'walk hit limit/timeout' on real projects. Skip heavy non-content
dirs + add a deadline check on directory descent.

* fix(integrity): skip inline-code spans + [Source:] citations in bare-tweet detection

Recipe/doc pages that show the CORRECT citation format inline (e.g.
`Tweeted about {topic} [Source: X, @handle, date]`) were false-flagged.
The fenced-code skip didn't cover inline backticks; add inline-code
stripping + an explicit-citation exemption.

---------

Co-authored-by: Son Le <tuanson1200@gmail.com>

src/commands/integrity.ts

@@ -98,8 +98,17 @@ export function findBareTweetHits(compiledTruth: string, slug: string): BareTwee
     }
     // If the line already contains a tweet URL, it's cited — skip
     if (URL_NEARBY_RE.test(line)) continue;
+    // If the line carries an explicit source citation (e.g.
+    // "[Source: X, @handle, 2026-05-28]"), it's already attributed — skip.
+    // Catches instructional/example lines in recipe docs that demonstrate
+    // the CORRECT citation format. (v0.42.x)
+    if (/\[\s*source:/i.test(line)) continue;
+    // Strip inline-code spans (`...`) before matching: phrases shown as
+    // inline-code templates in docs are examples, not bare claims. The
+    // fenced-code skip above only covers ``` blocks, not inline backticks.
+    const lineForMatch = line.replace(/`[^`]*`/g, '');
     for (const re of BARE_TWEET_PHRASES) {
-      const m = line.match(re);
+      const m = lineForMatch.match(re);
       if (m) {
         hits.push({ slug, line: i + 1, rawLine: line.trim(), phrase: m[0] });
         break; // one finding per line is enough

src/core/multi-source-drift.ts

@@ -87,6 +87,11 @@ function walkMarkdownAndMdxFiles(
     for (const entry of entries) {
       if (truncated) return;
       if (entry.startsWith('.')) continue;
+      // Skip heavy non-content dirs so the walk doesn't exhaust the time
+      // budget on dependency/build trees (node_modules can be 50k+ files
+      // with zero .md). These are never gbrain page sources.
+      if (entry === 'node_modules' || entry === 'dist' || entry === 'build' ||
+          entry === '.next' || entry === 'vendor' || entry === 'target') continue;
       const full = join(d, entry);
       let isDir = false;
       try {
@@ -95,6 +100,9 @@ function walkMarkdownAndMdxFiles(
         continue;
       }
       if (isDir) {
+        // Time check on directory descent too, so a deep dependency-free
+        // tree still respects the deadline even before any .md is found.
+        if (Date.now() >= deadlineMs) { truncated = true; return; }
         walk(full);
         continue;
       }