ci: fix pgx.Tx errcheck exclude (interface, not pointer) + gofmt

pgx.Tx is an interface, so the errcheck exclude-functions pattern
must use `(pkg.Tx).Rollback`, not `(*pkg.Tx).Rollback`. Also gofmt
three more files that slipped through.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: hallelx2

.golangci.yml

@@ -28,7 +28,7 @@ linters:
         - (io.Closer).Close
         - (*os.File).Close
         - (net/http.ResponseWriter).Write
-        - (*github.com/jackc/pgx/v5.Tx).Rollback
+        - (github.com/jackc/pgx/v5.Tx).Rollback
         - (github.com/hallelx2/vectorless-engine/pkg/queue.Queue).Close
   exclusions:
     rules:

cmd/engine/main.go

@@ -17,14 +17,14 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/hallelx2/vectorless-engine/internal/api"
-	"github.com/hallelx2/vectorless-engine/pkg/config"
-	"github.com/hallelx2/vectorless-engine/pkg/db"
-	"github.com/hallelx2/vectorless-engine/pkg/ingest"
 	"github.com/hallelx2/llmgate"
 	"github.com/hallelx2/llmgate/provider/anthropic"
 	"github.com/hallelx2/llmgate/provider/gemini"
 	"github.com/hallelx2/llmgate/provider/openai"
+	"github.com/hallelx2/vectorless-engine/internal/api"
+	"github.com/hallelx2/vectorless-engine/pkg/config"
+	"github.com/hallelx2/vectorless-engine/pkg/db"
+	"github.com/hallelx2/vectorless-engine/pkg/ingest"
 	"github.com/hallelx2/vectorless-engine/pkg/queue"
 	"github.com/hallelx2/vectorless-engine/pkg/retrieval"
 	"github.com/hallelx2/vectorless-engine/pkg/storage"

pkg/config/config.go

@@ -85,10 +85,10 @@ type S3StorageBlock struct {
 
 // QueueConfig configures the background job queue.
 type QueueConfig struct {
-	Driver string       `yaml:"driver"`
-	QStash QStashBlock  `yaml:"qstash"`
-	River  RiverBlock   `yaml:"river"`
-	Asynq  AsynqBlock   `yaml:"asynq"`
+	Driver string      `yaml:"driver"`
+	QStash QStashBlock `yaml:"qstash"`
+	River  RiverBlock  `yaml:"river"`
+	Asynq  AsynqBlock  `yaml:"asynq"`
 }
 
 // QStashBlock configures QStash.
@@ -141,8 +141,8 @@ type GeminiBlock struct {
 
 // RetrievalConfig configures the retrieval strategy.
 type RetrievalConfig struct {
-	Strategy     string              `yaml:"strategy"`
-	ChunkedTree  ChunkedTreeBlock    `yaml:"chunked_tree"`
+	Strategy    string           `yaml:"strategy"`
+	ChunkedTree ChunkedTreeBlock `yaml:"chunked_tree"`
 }
 
 // ChunkedTreeBlock configures the chunked-tree strategy.

pkg/parser/pdf.go

@@ -209,9 +209,9 @@ func extractPDFRows(reader *pdflib.Reader) ([]pdfRow, error) {
 		// Group letters by (approximate) baseline Y. Values within 2pt are
 		// considered the same row — PDFs frequently jitter Y by a fraction.
 		type rowBucket struct {
-			y      float64
-			maxFS  float64
-			chars  []pdflib.Text
+			y     float64
+			maxFS float64
+			chars []pdflib.Text
 		}
 		var buckets []*rowBucket
 		find := func(y float64) *rowBucket {
@@ -334,9 +334,9 @@ func parsePDFWithOutline(outline pdflib.Outline, rows []pdfRow) (*ParsedDoc, boo
 	// forgiving of trailing page numbers, section numbering prefixes the
 	// outline sometimes omits, etc.
 	type matched struct {
-		level   int
-		title   string
-		rowIdx  int // index into rows where this heading starts
+		level  int
+		title  string
+		rowIdx int // index into rows where this heading starts
 	}
 	var chosen []matched
 	cursor := 0