feat(stix_export): wire fingerprint bounties through all endpoints + tests

Remaining files from the fingerprint-bounties + characterizes-SRO commit:
misp_export, repository, bounties mixin, all 4 router endpoints, and test suite
updates. Prerequisite: previous commit added _extract_fingerprint_bounty_data
and the stix_export changes.

decnet/web/db/sqlmodel_repo/bounties.py

@@ -141,6 +141,40 @@ class BountiesMixin(_MixinBase):
                 grouped[item.attacker_ip].append(d)
             return dict(grouped)
 
+    async def get_fingerprint_bounties_by_ip(self, ip: str) -> List[dict[str, Any]]:
+        async with self._session() as session:
+            result = await session.execute(
+                select(Bounty)
+                .where(Bounty.attacker_ip == ip, Bounty.bounty_type == "fingerprint")
+                .order_by(asc(Bounty.timestamp))
+            )
+            out: List[dict[str, Any]] = []
+            for item in result.scalars().all():
+                d = item.model_dump(mode="json")
+                try:
+                    d["payload"] = json.loads(d["payload"])
+                except (json.JSONDecodeError, TypeError):
+                    pass
+                out.append(d)
+            return out
+
+    async def get_all_fingerprint_bounties_for_export(self) -> dict[str, List[dict[str, Any]]]:
+        async with self._session() as session:
+            result = await session.execute(
+                select(Bounty)
+                .where(Bounty.bounty_type == "fingerprint")
+                .order_by(asc(Bounty.timestamp))
+            )
+            grouped: dict[str, List[dict[str, Any]]] = defaultdict(list)
+            for item in result.scalars().all():
+                d = item.model_dump(mode="json")
+                try:
+                    d["payload"] = json.loads(d["payload"])
+                except (json.JSONDecodeError, TypeError):
+                    pass
+                grouped[item.attacker_ip].append(d)
+            return dict(grouped)
+
     async def count_probe_relays(self, attacker_ip: str, decky: str) -> int:
         """Return how many probe_relay bounties exist for this (attacker_ip, decky) pair."""
         async with self._session() as session: