chore: remove all source code comments and internal artifacts

Strip every comment from the source (parsed with the TypeScript compiler so
strings, template literals, regex literals and JSX are never touched), and drop
internal/working artifacts that do not belong in the public repository
(design mockups, internal analysis docs, a stray backup file and an old log).
No functional change: build is green, the full test suite passes.

tests/integrity.test.ts

@@ -34,25 +34,20 @@ describe("integrity", () => {
     const dir = fs.mkdtempSync(path.join(os.tmpdir(), "rd-int-"));
     tempDirs.push(dir);
 
-    // Create a .md5 manifest that exceeds the 5MB limit
     const largeContent = "d41d8cd98f00b204e9800998ecf8427e  sample.bin\n".repeat(200000);
     const manifestPath = path.join(dir, "hashes.md5");
     fs.writeFileSync(manifestPath, largeContent, "utf8");
 
-    // Verify the file is actually > 5MB
     const stat = fs.statSync(manifestPath);
     expect(stat.size).toBeGreaterThan(5 * 1024 * 1024);
 
-    // readHashManifest should skip the oversized file
     const manifest = readHashManifest(dir);
     expect(manifest.size).toBe(0);
   });
 
   it("does not parse SHA256 (64-char hex) as valid hash", () => {
-    // SHA256 is 64 chars - parseHashLine only supports 32 (MD5) and 40 (SHA1)
     const sha256Line = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855  emptyfile.bin";
     const result = parseHashLine(sha256Line);
-    // 64-char hex should not match the MD5 (32) or SHA1 (40) pattern
     expect(result).toBeNull();
   });