M3: fix path-shape drift via adapter contract + identity tests

Root cause (HAR-diagnosed): replay script wrote firebase-prefixed paths via
raw REST, bypassing adapter norm(). Two path roots coexisted in db:
  bare 'campaigns/X' (adapter writes, from App)
  prefixed 'artifacts/.../campaigns/X' (replay raw writes)
Adapter read bare, missed prefixed. UI showed stale test1 (legit manual UI
write, not wiped) but replay campaigns invisible.

A. replay-combat.js: use createWsStorage adapter instead of raw fetch. Same
   contract boundary as App. norm() runs on all paths. Can't drift.
   Mirror App.js getPath locally for path construction.
B. contract.js: 4 new identity tests (setDoc prefixed -> getCollection bare,
   setDoc prefixed -> getDoc bare, setDoc prefixed -> getDoc prefixed,
   setDoc bare -> getCollection prefixed). Run against every impl (memory,
   ws). memory.js lacked norm() -> RED first, now GREEN after adding norm.
C. db moved out of /tmp to ./data/tracker.sqlite (gitignored). Never tmp.

Tests: 124 green (39 shared + 23 ws-contract + 62 FE).

.gitignore

@@ -11,3 +11,4 @@ data/*.sqlite
 data/*.sqlite-*
 server/data/*.sqlite
 server/data/*.sqlite-*
+/data