feat: add async indexes to getindexinfo RPC

Add addressindex, timestampindex, and spentindex to getindexinfo RPC
output. Update rpc_misc.py test to verify new indexes are reported.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: UdjinM6

src/rpc/node.cpp

@@ -12,6 +12,7 @@
 #include <index/blockfilterindex.h>
 #include <index/coinstatsindex.h>
 #include <index/spentindex.h>
+#include <index/timestampindex.h>
 #include <index/txindex.h>
 #include <init.h>
 #include <interfaces/chain.h>
@@ -1142,6 +1143,18 @@ static RPCHelpMan getindexinfo()
         result.pushKVs(SummaryToJSON(index.GetSummary(), index_name));
     });
 
+    if (g_addressindex) {
+        result.pushKVs(SummaryToJSON(g_addressindex->GetSummary(), index_name));
+    }
+
+    if (g_timestampindex) {
+        result.pushKVs(SummaryToJSON(g_timestampindex->GetSummary(), index_name));
+    }
+
+    if (g_spentindex) {
+        result.pushKVs(SummaryToJSON(g_spentindex->GetSummary(), index_name));
+    }
+
     return result;
 }
     };

test/functional/rpc_misc.py

@@ -86,7 +86,8 @@ def run_test(self):
         assert_equal(node.getindexinfo(), {})
 
         # Restart the node with indices and wait for them to sync
-        self.restart_node(0, ["-txindex", "-blockfilterindex", "-coinstatsindex"])
+        self.restart_node(0, ["-txindex", "-blockfilterindex", "-coinstatsindex",
+                              "-addressindex", "-timestampindex", "-spentindex"])
         self.wait_until(lambda: all(i["synced"] for i in node.getindexinfo().values()))
 
         # Returns a list of all running indices by default
@@ -97,10 +98,14 @@ def run_test(self):
                 "txindex": values,
                 "basic block filter index": values,
                 "coinstatsindex": values,
+                "addressindex": values,
+                "timestampindex": values,
+                "spentindex": values,
             }
         )
         # Specifying an index by name returns only the status of that index
-        for i in {"txindex", "basic block filter index", "coinstatsindex"}:
+        for i in {"txindex", "basic block filter index", "coinstatsindex",
+                  "addressindex", "timestampindex", "spentindex"}:
             assert_equal(node.getindexinfo(i), {i: values})
 
         # Specifying an unknown index name returns an empty result