Add error counter of some sort to count bad cursor connects so admin can take action

[matthewdarwin]

In prometheus exporter for firehose and substreams-tier1, add error counter of some sort to count bad cursor connects so admin can take action.

2024-01-26T23:39:16.069Z INFO (firehose) processing incoming blocks request {"trace_id": "f3f777a35285592915af3541f4796952", "req_start_block": 35551499, "req_cursor": "fJKgKLeJc4qUmmBgqLig1KWwLpc_DFlqUA7kLhhJj4zw-HLE25iiBjUgYBqGkfv22xK4GVyt2Y2cRih6oMRS6YO7weljvyk_R34ukY7t8rzmcPfzbFkSc7kzX7yIYYnRWDnSZwv_c7kK59PvOvLfYkY0NpIuKzCy3TlWpdYGdqIW6yJnlT2vd82HgqqUoIUT9-UkQeajkiiqDzx1KE4PbsWAZaOf6TojNA==", "req_stop_block": 0, "final_blocks_only": false, "with_index_provider": true, "transform_desc": "Combined filter: Calls:[], Logs:[{addrs: 0x6bd8e3beec87176ba9c705c9507aa5e6f0e6706f,0x9abc3f6c11dbd83234d6e6b2c373dfc1893f6...}], SendAllBlockHeaders: false", "api_key_id": "xxxxxxxxxxx", "user_id": "xxxxxxxxxxx", "real_ip": "1.2.3.4"}

2024-01-26T23:39:16.070Z INFO (firehose) creating new joining source {"trace_id": "f3f777a35285592915af3541f4796952", "cursor": "c1:17:35551498:768016546de87f1b667cb617babf1b42eba2a7b87152273989841ec922a0f63a:35551498:768016546de87f1b667cb617babf1b42eba2a7b87152273989841ec922a0f63a", "start_block_num": 35551499}

2024-01-26T23:39:27.191Z INFO (firehose) firehose process completed {"trace_id": "f3f777a35285592915af3541f4796952", "block_sent": 0, "egress_bytes": 0, "error": "cannot resolve cursor: missing link between blocks 35551498 and #35551498 (768016546de87f1b667cb617babf1b42eba2a7b87152273989841ec922a0f63a): no forked-block file found with ID ending with 19d9b5df2b09b45f.", "api_key_id": "xxxxxxxxxxx, "user_id": "xxxxxxxxxxx", "real_ip": "1.2.3.4"}

[matthewdarwin]

Generically do this for any type of error.