feat: add confluence.signalHistory API route

Returns signal fire history for a symbol (last 6 months) with slot
names and body types. Used by the upcoming confluence chart to plot
signal markers on price data.

app/server/src/trpc/router.ts

@@ -33,7 +33,7 @@ import { computeOwnershipPercentages, fetchAndPersistFloat } from '../services/s
 import { EdgarAdapter } from '../adapters/EdgarAdapter.ts';
 import { OptionsAdapter, parseOptionChainRows } from '../adapters/OptionsAdapter.ts';
 import type { OptionChainRow, OptionGreeks } from '../adapters/OptionsAdapter.ts';
-import { CONFLUENCE_SLOTS, slotsByFamily, type SlotFamily } from '../confluence/confluenceSlots.ts';
+import { CONFLUENCE_SLOTS, slotsByFamily, type SlotFamily, confluenceslotById } from '../confluence/confluenceSlots.ts';
 import { CONFLUENCE_SLOT_IDS } from '../confluence/confluenceSlots.ts';
 import { ConfluenceRepository, rackFromSlots } from '../db/confluenceRepository.ts';
 import { runSlotBacktest, signalHistoryToStats, type ConfluenceFireEvent } from '../confluence/confluenceBacktest.ts';
@@ -5473,6 +5473,32 @@ const confluenceRouter = router({
       };
     }),
 
+  /** Signal fire history for a symbol (last 6 months). Used by the confluence chart. */
+  signalHistory: publicProcedure
+    .input(z.object({ symbol: z.string().min(1).max(12) }))
+    .query(({ ctx, input }) => {
+      const symbol = input.symbol.toUpperCase();
+      const repo = new ConfluenceRepository(ctx.db);
+      const allFires = repo.listSignalsForSymbol(symbol);
+      // Filter to last 6 months
+      const cutoff = new Date();
+      cutoff.setMonth(cutoff.getMonth() - 6);
+      const cutoffStr = cutoff.toISOString();
+      const fires = allFires
+        .filter((f) => f.firedAt >= cutoffStr)
+        .map((f) => {
+          const meta = confluenceslotById.get(f.slotId);
+          return {
+            slotId: f.slotId,
+            slotName: meta?.name ?? f.slotId,
+            body: (meta?.body ?? 'bull') as 'bull' | 'bear' | 'exit',
+            firedAt: f.firedAt,
+            qualityAtFire: f.qualityAtFire,
+          };
+        });
+      return { fires };
+    }),
+
   /** Create or update a user-owned rack. */
   saveRack: protectedProcedure
     .input(z.object({