fix(dockerfile): correct golang version from 1.24 to 1.25

Go 1.25 is the minimum required version per go.mod.
Fixes build error: 'go.mod requires go >= 1.25.0 (running go 1.24.13)'

cmd/acb-enrichment/Dockerfile

@@ -4,7 +4,7 @@
 # generates turn-by-turn narrative highlights via LLM, and stores results.
 
 # Build stage
-FROM golang:1.24-alpine AS builder
+FROM golang:1.25-alpine AS builder
 
 WORKDIR /build