feat: 207× throughput multiple (with private repos + Bookface)

Re-ran scripts/garry-output-comparison.ts across all 41 repos under
garrytan/* (15 public + 26 private), including Bookface (YC's internal
social network, 2013-era work).

2013 activity: 71 commits, 5,143 logical lines, 4 active repos
  (bookface, delicounter, tandong, zurb-foundation-wysihtml5)
2026 activity: 350 commits, 1,064,818 logical lines, 15 active repos
  (gbrain, gstack, gbrowser, tax-app, kumo, tenjin, autoemail, kitsune,
  easy-chromium-compiles, conductor-playground, garryslist-agent, baku,
  gstack-website, resend_robot, garryslist-brain)

Multiples:
- Logical SLOC: 207× (up from 130.2× when including private work)
- Raw lines: 223×
- Commits/active-week: 3.4×

Stopped committing docs/throughput-2013-vs-2026.json — analysis is a
local artifact, not repo state. Added docs/throughput-*.json to
.gitignore. Full markdown analysis at ~/throughput-analysis-2026-04-18.md
(local-only). README multiple is now hardcoded; re-run the script and
edit manually when you want to refresh it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/throughput-2013-vs-2026.json

@@ -1,47 +0,0 @@
-{
-  "computed_at": "2026-04-18T03:57:34Z",
-  "scc_available": true,
-  "years": [
-    {
-      "year": 2013,
-      "active": true,
-      "commits": 2,
-      "files_touched": 36,
-      "raw_lines_added": 3250,
-      "logical_lines_added": 2384,
-      "active_weeks": 1,
-      "repos_contributed": 1,
-      "caveats": [
-        "Aggregated across 1 public repos with activity in this year.",
-        "Public repos only (enumerated via `gh repo list garrytan --visibility=public --limit 500`)."
-      ]
-    },
-    {
-      "year": 2026,
-      "active": true,
-      "commits": 279,
-      "files_touched": 4774,
-      "raw_lines_added": 436824,
-      "logical_lines_added": 310484,
-      "active_weeks": 17,
-      "repos_contributed": 3,
-      "caveats": [
-        "Aggregated across 3 public repos with activity in this year.",
-        "Public repos only (enumerated via `gh repo list garrytan --visibility=public --limit 500`)."
-      ]
-    }
-  ],
-  "multiples": {
-    "logical_lines_added": 130.2,
-    "commits_per_week": 8.2,
-    "raw_lines_added": 134.4
-  },
-  "caveats_global": [
-    "Aggregated across 15 public garrytan/* repos (forks included since they can contain authored commits). Private work at both eras is excluded.",
-    "2013 public activity reflects upstream contributions to open-source libraries (zurb-foundation-wysihtml5). 2013 private work at YC (Bookface) and Posterous-era work is excluded.",
-    "2026 public activity covers gbrain, gstack, and resend_robot — the three non-fork greenfield repos Garry authored this year.",
-    "scc-available regex classification excludes blank lines and single-line comments. Approximate; does not catch block comments or docstrings.",
-    "Authorship via commit email filter: garry@ycombinator.com + historical aliases."
-  ],
-  "version": 1
-}