fix: use ./... in CI and restore local dev host connection

CI test command: switch from explicit package list to ./... so new
packages are automatically included.

local-dev-2.sh: override POSTGRES_HOST=localhost for the host-side
go run -tags dev ./main.go. The dev-tagged Connect() now reads
POSTGRES_HOST from env (needed for CI where service containers use
Docker DNS). Locally, .env sets POSTGRES_HOST=postgres, but that
name only resolves inside Docker — not from the host where the dev
server runs. Override to localhost so it connects via Docker's port
forwarding.

local-dev-2.sh

@@ -131,7 +131,7 @@ tmux select-pane -t $SESSION_NAME:0.0 -T "DB"
 
 # Pane 1: Backend (Split Horizontally)
 tmux split-window -v -t $SESSION_NAME
-tmux send-keys -t $SESSION_NAME "set -a; source .env > /dev/null 2>&1; cd backend && go run -tags dev ./main.go" Enter
+tmux send-keys -t $SESSION_NAME "set -a; source .env > /dev/null 2>&1; cd backend && POSTGRES_HOST=localhost go run -tags dev ./main.go" Enter
 tmux select-pane -t $SESSION_NAME:0.1 -T "Backend"
 
 # Pane 2: Frontend (Split Vertically from Backend)
@@ -1475,7 +1475,7 @@ cd /home/popertots/Crussell/backend
 export POSTGRES_USER POSTGRES_PASSWORD POSTGRES_HOST POSTGRES_DB GO_TESTING=1
 TEST_OUTPUT_FILE=$(mktemp)
 START_TIME=$(date +%s)
-  go test -tags "test,dev" -v -count=1 -parallel 8 ./... 2>&1 | tee "$TEST_OUTPUT_FILE" || true
+  go test -tags "test,dev" -v -count=1 ./... 2>&1 | tee "$TEST_OUTPUT_FILE" || true
 END_TIME=$(date +%s)
 DURATION=$((END_TIME - START_TIME))
 MINUTES=$((DURATION / 60))