gbfs/api: dynamic per-station og:image (/og/s/<slug>.png)

Satori-rendered 1200×630 share cards: station header (name,
short_name, docks, type, since) + a live 7-day hourly bikes sparkline
read through the full avail-v3 serving path (synthesized internal
request → inventory planner → LUC cell query — one code path to
trust). ~1.5 s cold, edge-cached 1d, ~35 KB PNG.

Workers-wasm wrinkles, for posterity:
- default `satori` entry embeds yoga wasm as base64 and compiles at
  runtime → "Wasm code generation disallowed by embedder". Use
  `satori/standalone` + `init(yogaModule)` with wrangler-compiled
  `.wasm` imports (same for resvg via `initWasm`).
- `src/assets/yoga.wasm` is copied from satori's own `./yoga.wasm`
  export (version-matched to its yoga-layout dep) — recopy on bumps.
- defining any `[[rules]]` (needed for the `.ttf` Data rule) displaces
  wrangler's built-in CompiledWasm rule; both restated.
- satori needs `nodejs_compat` (`process` references).

Sparkline degrades gracefully: no LUC entry / no data → header-only
card. Phase 2 (task #153): www build step emitting per-station HTML
stubs whose `og:image` meta points here (crawlers don't run JS; GH
Pages serves one index.html for all routes).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: ryan-williams

gbfs/api/package.json

@@ -17,9 +17,11 @@
   "dependencies": {
     "@rdub/file-tree": "https://github.com/runsascoded/file-tree#d3476b0d2cb398197f3a1383f41fe3b0216be39f",
     "@rdub/thrds": "https://github.com/runsascoded/thrds#ts-dist",
+    "@resvg/resvg-wasm": "^2.6.2",
     "hyparquet": "https://github.com/runsascoded/hyparquet#0f355ea5a37dcb9b29a43e33a3d45ce660c80798",
     "pyrmts": "https://github.com/runsascoded/pyrmts#ffc72db1c72dca93db719b1fe6e250c31e5644e9&path:/js/packages/pyrmts",
     "pyrmts-cfw": "https://github.com/runsascoded/pyrmts#ffc72db1c72dca93db719b1fe6e250c31e5644e9&path:/js/packages/pyrmts-cfw",
-    "pyrmts-geo": "https://github.com/runsascoded/pyrmts#ffc72db1c72dca93db719b1fe6e250c31e5644e9&path:/js/packages/pyrmts-geo"
+    "pyrmts-geo": "https://github.com/runsascoded/pyrmts#ffc72db1c72dca93db719b1fe6e250c31e5644e9&path:/js/packages/pyrmts-geo",
+    "satori": "^0.26.0"
   }
 }