fix(rust): send reward notices, and keep a downed line's credit rule (W21, W4)

W21: the permission push named its fields one by one and left out
`notices`, so no kit reward, lend or give ever told its player
anything (D333). The body is now built by `pushBody`, which carries
every field the payload has; a test fails if a payload field is
dropped again.

W4: a downed patrol helicopter, Chinook or Bradley is stored with the
credit rule in force when it arrived, and the feed reads that stamp.
Before, the line re-credited past rows with the server's current rule
while the Rotorbane/Tankbreaker counts kept the old one. Rows stored
before this change keep today's reading.

PLAN_LAST_FIXES.md stage 1.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

server/ingest.js

@@ -72,7 +72,9 @@ const MAX_BATCHES_PER_TICK = 10
  * how to read.
  */
 async function apply(serverId, item, server = null) {
-  const frame = (item && item.frame) || {}
+  // A downed helicopter, Chinook or Bradley is stored with the rule that
+  // credits it now, so its line and its counts agree for good (W4).
+  const frame = worldEvents.stampRule((item && item.frame) || {}, server && server.creditRule)
   const kind = item.kind || frame.kind
   const wipeId = frame.wipeId || null
 
@@ -278,8 +280,7 @@ async function apply(serverId, item, server = null) {
     // A protocol-13 plugin still sends `heliKills` / `apcKills` on its tally
     // instead, and the tally path above adds those as it always has.
     case 'world.event': {
-      const rule = worldEvents.creditRuleOf(server && server.creditRule)
-      for (const kill of worldEvents.killsOf(frame, rule)) {
+      for (const kill of worldEvents.killsOf(frame, worldEvents.ruleOf(frame, server && server.creditRule))) {
         await db.touchPlayer(kill.steamId, kill.name || null)
         await db.addTitleStats({ serverId, wipeId, steamId: kill.steamId }, { [kill.field]: 1 })
       }