feat: v3.0.0 - intelligent search, GitHub person/project mode, ELI5, 13+ sources

v3 rewrites the search engine from the ground up:

- Intelligent pre-research: resolves X handles, GitHub repos, subreddits,
  TikTok hashtags, and YouTube channels before searching
- GitHub person-mode: PR velocity, top repos by stars, release notes
- GitHub project-mode: live star counts, README, releases, top issues
- ELI5 mode: plain language synthesis, no jargon
- 13+ sources: Reddit, X, YouTube, TikTok, Instagram, HN, Polymarket,
  GitHub, Threads, Pinterest, Perplexity, Bluesky, Web
- Free Reddit comments via public JSON (no API key needed)
- Fun judge v2: humor scoring baked into narrative
- Cookie consent before browser scanning
- 10,000 free ScrapeCreators calls
- 1,012 tests

Thank you to the community contributors whose issues and PRs shaped v3:
@uppinote20 (#143), @zerone0x (#134, #136), @thinkun (#116),
@thomasmktong (#124), @fanispoulinakisai-boop (#100), @pejmanjohn (#78),
@zl190 (#115), @hnshah (#84, #85, #86)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/test_http_v3.py

@@ -0,0 +1,43 @@
+import sys
+import urllib.error
+import unittest
+from pathlib import Path
+from unittest.mock import patch, MagicMock
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "scripts"))
+
+from lib import http
+
+
+class Test429RetryLimit(unittest.TestCase):
+    """429 retries must be capped at max_429_retries to avoid wasting latency."""
+
+    @patch("lib.http.urllib.request.urlopen")
+    @patch("lib.http.time.sleep")  # Don't actually sleep in tests
+    def test_429_retries_limited_to_2_by_default(self, mock_sleep, mock_urlopen):
+        """With default max_429_retries=2, should attempt 2 times then raise."""
+        error = urllib.error.HTTPError(
+            "http://example.com", 429, "Too Many Requests", {}, None
+        )
+        mock_urlopen.side_effect = error
+
+        with self.assertRaises(http.HTTPError) as ctx:
+            http.request("GET", "http://example.com", retries=5)
+
+        self.assertEqual(ctx.exception.status_code, 429)
+        # Should be called exactly 2 times (initial + 1 retry), not 5
+        self.assertEqual(mock_urlopen.call_count, 2)
+
+    @patch("lib.http.urllib.request.urlopen")
+    @patch("lib.http.time.sleep")
+    def test_non_429_errors_still_use_full_retries(self, mock_sleep, mock_urlopen):
+        """500 errors should still retry up to the full retries count."""
+        error = urllib.error.HTTPError(
+            "http://example.com", 500, "Internal Server Error", {}, None
+        )
+        mock_urlopen.side_effect = error
+
+        with self.assertRaises(http.HTTPError):
+            http.request("GET", "http://example.com", retries=3)
+
+        self.assertEqual(mock_urlopen.call_count, 3)