Remove phaseflow-cron batch job

No longer needed - cron scheduling now handled by instrumentation.ts
inside the main phaseflow app.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/phaseflow-cron.hcl

@@ -1,52 +0,0 @@
-# ABOUTME: Periodic batch job for PhaseFlow Garmin sync.
-# ABOUTME: Triggers daily sync at 6 AM to fetch fitness data and generate training recommendations.
-
-job "phaseflow-cron" {
-  datacenters = ["alo"]
-  type        = "batch"
-
-  periodic {
-    crons            = ["0 8 * * *"]
-    prohibit_overlap = true
-    time_zone        = "Europe/Lisbon"
-  }
-
-  group "garmin-sync" {
-    task "trigger" {
-      driver = "raw_exec"
-
-      config {
-        command = "/bin/sh"
-        args    = ["local/script.sh"]
-      }
-
-      template {
-        destination = "local/script.sh"
-        data        = <<EOH
-set -e
-RESPONSE=$(/run/current-system/sw/bin/curl -s -w "\n%%{http_code}" -X POST \
-  -H "Authorization: Bearer $CRON_SECRET" \
-  https://phaseflow.v.paler.net/api/cron/garmin-sync)
-
-HTTP_CODE=$(echo "$RESPONSE" | tail -n1)
-BODY=$(echo "$RESPONSE" | sed '$d')
-
-echo "$BODY"
-
-if [ "$HTTP_CODE" -ge 400 ]; then
-  echo "HTTP error: $HTTP_CODE" >&2
-  exit 1
-fi
-EOH
-      }
-
-      template {
-        destination = "secrets/env.env"
-        env         = true
-        data        = <<EOH
-{{- with nomadVar "secrets/phaseflow" -}}CRON_SECRET="{{ .cron_secret }}"{{- end -}}
-EOH
-      }
-    }
-  }
-}