Report day outcomes (target hit / partial / loss) to the master

The reporter already computed targetHit per account to count it as
traded; now it also classifies each account that finished the day flat
and sends targetHit/partial/loss counts per firm and account type. A
realized loss reports as loss even on a grind day where any nonzero PnL
counts as done. Fields are additive, so an older master ignores them.

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

lib/master-protocol.ts

@@ -14,6 +14,13 @@ export interface AccountTypeStats {
     totalAccounts: number;
     accountsTraded: number;
     inTrade: number;
+    /** Of the accounts that finished trading today (traded, no open position):
+     *  how many ended with the day's profit target hit, in profit but short of
+     *  the target, or at a realized loss. Optional so an older master simply
+     *  ignores them. */
+    targetHit?: number;
+    partial?: number;
+    loss?: number;
 }
 
 export interface FirmStats {
@@ -21,6 +28,10 @@ export interface FirmStats {
     totalAccounts: number;
     accountsTraded: number;
     inTrade: number;
+    /** Day outcomes, as on AccountTypeStats. */
+    targetHit?: number;
+    partial?: number;
+    loss?: number;
     /** Per account type, summing to the firm's own totals. Optional so a master
      *  on an older build simply ignores it. */
     accountTypes?: AccountTypeStats[];