perf: proto schema thinning (dual-variant build tags) to cut decode GC

Dockerfile

@@ -6,7 +6,9 @@ COPY go.mod go.sum ./
 RUN if [ ! -f vendor/modules.txt ]; then go mod download; fi
 
 COPY . .
-RUN CGO_ENABLED=0 go build -tags go_json -o /go/bin/golbat
+# `thin`: trimmed pogo schema (pogo/vbase.thin.pb.go) — decode skips the fields
+# Golbat never reads. Same decoded values as the full schema; fewer allocations.
+RUN CGO_ENABLED=0 go build -tags go_json,thin -o /go/bin/golbat
 RUN mkdir /empty-dir
 
 # Now copy it into our base image.

Makefile

@@ -9,8 +9,15 @@ FLAGS = go_json
 #FLAGS := go_json
 #endif
 
+# `thin` selects the trimmed pogo schema (pogo/vbase.thin.pb.go): decode skips
+# the ~97% of proto fields Golbat never reads, cutting decode allocations. This
+# is the default production build. Use `make golbat-full` for the full schema
+# (identical decoded values; only useful for contributors adding field access).
 golbat: FORCE
-	go build -tags $(FLAGS) golbat
+	go build -tags $(FLAGS),thin golbat
+
+golbat-full: FORCE
+	go build -tags $(FLAGS) -o golbat golbat
 
 # --- Profile-guided optimization --------------------------------------------
 # Go (>= 1.21) automatically applies ./default.pgo when building the golbat

pogo/vbase.pb.go

@@ -1,3 +1,5 @@
+//go:build !thin
+
 //
 // Copyright 2016-2026 --=FurtiF=--.
 //