wiki: document dev environment (WSL networking, workflow)

Capture hard-won dev knowledge that was only in commit messages:

- wsl-dev-networking: WSL2 NAT blocks UDP broadcast (device discovery can't
  reach the LAN); fix is mirrored networking (.wslconfig, Win11 22H2+), plus the
  gotchas that remained after — multiple interfaces, subnet-directed broadcast,
  localhost->IPv6 stall. Alternatives for non-mirrored setups.
- local-dev-workflow: first-time setup, pnpm dev, and the gotchas (the
  strip-types dev-server hang -> tsx, the 127.0.0.1 proxy fix, .env loading,
  seeding into the right DB).
- device-discovery: corrected the old "broadcast permission (EACCES)" note — the
  real cause was the lib not enabling SO_BROADCAST for global 255.255.255.255;
  documented the three verified broadcast gotchas + I/O serialization.
- schema: add a `reference` page type; new "Dev environment" index section; log.

Links lint clean; both new pages well-connected.

wiki/index.md

@@ -66,6 +66,10 @@ Counts: 1 source · 14 entities · 10 concepts · 2 decision records.
 - [[entry-exit-readers]] — two populations, two integration paths; both can share a relay.
 - [[uhppote-vs-esp32]] — comparison: detection vs. prevention.
 
+## Dev environment (reference)
+- [[local-dev-workflow]] — running the stack locally; setup, the dev-hang gotchas, seed:admin.
+- [[wsl-dev-networking]] — WSL2 NAT blocks device broadcast; use mirrored mode + the gotchas after.
+
 ## Decisions
 - [[standing-decisions]] — settled decisions (stack, platform, integrity, access control, readers).
 - [[open-questions]] — 7 open items (6 procurement + JWT key choice); ESP32 device auth deferred.