Merge origin/add-micro-blog-section, keeping D1 storage

Resolves conflicts in favor of D1 over R2 for micro post storage.
Retains the restored micro CLI from the remote (packages/micro/).

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

Author: just-be-dev

scripts/gen-url-manifest.ts

@@ -351,7 +351,7 @@ async function genUrlManifest(collections: string[]) {
   for (const collection of collections) {
     let result;
     if (collection === "micro") {
-      // Special handling for micro posts from D1
+      // Special handling for micro posts from R2
       result = await processMicroCollection(manifest, existingSlugToCode, seenSlugsInCurrentRun);
     } else {
       // File-based collections