fix: follow up with doc fixes and config path creation (#1291)

## Description

quick follow up for the last tracing PR

config/toml.go

@@ -563,9 +563,10 @@ trace_type = "{{ .Instrumentation.TraceType }}"
 # The size of the batches that are sent to the database.
 trace_push_batch_size = {{ .Instrumentation.TraceBufferSize }}
 
-# The list of tables that are updated when tracing. All available tables and
-# their schema can be found in the pkg/trace/schema package. It is represented as a
-# comma separate string. For example: "consensus_round_state,mempool_tx".
+# The list of tables that are updated when tracing. Tables not included will
+# not be traced. All available tables and their schema can be found in the
+# pkg/trace/schema package. It is represented as a comma separate string.
+# For example: "consensus_round_state,mempool_tx".
 tracing_tables = "{{ .Instrumentation.TracingTables }}"
 
 # The URL of the pyroscope instance to use for continuous profiling.

pkg/trace/fileserver.go

@@ -3,7 +3,6 @@ package trace
 import (
 	"bufio"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io"
 	"mime"
@@ -177,12 +176,9 @@ type S3Config struct {
 }
 
 // readS3Config reads an S3Config from a file in the given directory.
-func readS3Config(dir string) (S3Config, error) {
+func readS3Config(path string) (S3Config, error) {
 	cfg := S3Config{}
-	f, err := os.Open(filepath.Join(dir, "s3.json"))
-	if errors.Is(err, os.ErrNotExist) {
-		return cfg, nil
-	}
+	f, err := os.Open(path)
 	if err != nil {
 		return cfg, err
 	}

pkg/trace/schema/mempool.go

@@ -21,7 +21,7 @@ const (
 	MempoolTxTable = "mempool_tx"
 )
 
-// MemPoolTx describes the schema for the "mempool_tx" table.
+// MempoolTx describes the schema for the "mempool_tx" table.
 type MempoolTx struct {
 	TxHash       string       `json:"tx_hash"`
 	Peer         p2p.ID       `json:"peer"`