fix: route all telemetry through edge functions, not PostgREST

- gstack-telemetry-sync: POST to /functions/v1/telemetry-ingest instead of
  /rest/v1/telemetry_events. Removes sed field-renaming (edge function expects
  raw JSONL names). Parses inserted count — holds cursor if zero inserted.
- gstack-update-check: POST to /functions/v1/update-check.
- gstack-community-dashboard: calls community-pulse edge function instead of
  direct PostgREST queries.
- config.sh: removes GSTACK_TELEMETRY_ENDPOINT, fixes misleading comment.

bin/gstack-telemetry-sync

@@ -3,11 +3,12 @@
 #
 # Fire-and-forget, backgrounded, rate-limited to once per 5 minutes.
 # Strips local-only fields before sending. Respects privacy tiers.
+# Posts to the telemetry-ingest edge function (not PostgREST directly).
 #
 # Env overrides (for testing):
 #   GSTACK_STATE_DIR           — override ~/.gstack state directory
 #   GSTACK_DIR                 — override auto-detected gstack root
-#   GSTACK_TELEMETRY_ENDPOINT  — override Supabase endpoint URL
+#   GSTACK_SUPABASE_URL        — override Supabase project URL
 set -uo pipefail
 
 GSTACK_DIR="${GSTACK_DIR:-$(cd "$(dirname "$0")/.." && pwd)}"
@@ -19,15 +20,15 @@ RATE_FILE="$ANALYTICS_DIR/.last-sync-time"
 CONFIG_CMD="$GSTACK_DIR/bin/gstack-config"
 
 # Source Supabase config if not overridden by env
-if [ -z "${GSTACK_TELEMETRY_ENDPOINT:-}" ] && [ -f "$GSTACK_DIR/supabase/config.sh" ]; then
+if [ -z "${GSTACK_SUPABASE_URL:-}" ] && [ -f "$GSTACK_DIR/supabase/config.sh" ]; then
   . "$GSTACK_DIR/supabase/config.sh"
 fi
-ENDPOINT="${GSTACK_TELEMETRY_ENDPOINT:-}"
+SUPABASE_URL="${GSTACK_SUPABASE_URL:-}"
 ANON_KEY="${GSTACK_SUPABASE_ANON_KEY:-}"
 
 # ─── Pre-checks ──────────────────────────────────────────────
-# No endpoint configured yet → exit silently
-[ -z "$ENDPOINT" ] && exit 0
+# No Supabase URL configured yet → exit silently
+[ -z "$SUPABASE_URL" ] && exit 0
 
 # No JSONL file → nothing to sync
 [ -f "$JSONL_FILE" ] || exit 0
@@ -66,6 +67,8 @@ UNSENT="$(tail -n "+$SKIP" "$JSONL_FILE" 2>/dev/null || true)"
 [ -z "$UNSENT" ] && exit 0
 
 # ─── Strip local-only fields and build batch ─────────────────
+# Edge function expects raw JSONL field names (v, ts, sessions) —
+# no column renaming needed (the function maps them internally).
 BATCH="["
 FIRST=true
 COUNT=0
@@ -75,13 +78,10 @@ while IFS= read -r LINE; do
   [ -z "$LINE" ] && continue
   echo "$LINE" | grep -q '^{' || continue
 
-  # Strip local-only fields + map JSONL field names to Postgres column names
+  # Strip local-only fields (keep v, ts, sessions as-is for edge function)
   CLEAN="$(echo "$LINE" | sed \
     -e 's/,"_repo_slug":"[^"]*"//g' \
     -e 's/,"_branch":"[^"]*"//g' \
-    -e 's/"v":/"schema_version":/g' \
-    -e 's/"ts":/"event_timestamp":/g' \
-    -e 's/"sessions":/"concurrent_sessions":/g' \
     -e 's/,"repo":"[^"]*"//g')"
 
   # If anonymous tier, strip installation_id
@@ -106,21 +106,31 @@ BATCH="$BATCH]"
 # Nothing to send after filtering
 [ "$COUNT" -eq 0 ] && exit 0
 
-# ─── POST to Supabase ────────────────────────────────────────
-HTTP_CODE="$(curl -s -o /dev/null -w '%{http_code}' --max-time 10 \
-  -X POST "${ENDPOINT}/telemetry_events" \
+# ─── POST to edge function ───────────────────────────────────
+RESP_FILE="$(mktemp /tmp/gstack-sync-XXXXXX 2>/dev/null || echo "/tmp/gstack-sync-$$")"
+HTTP_CODE="$(curl -s -w '%{http_code}' --max-time 10 \
+  -X POST "${SUPABASE_URL}/functions/v1/telemetry-ingest" \
   -H "Content-Type: application/json" \
   -H "apikey: ${ANON_KEY}" \
-  -H "Authorization: Bearer ${ANON_KEY}" \
-  -H "Prefer: return=minimal" \
+  -o "$RESP_FILE" \
   -d "$BATCH" 2>/dev/null || echo "000")"
 
 # ─── Update cursor on success (2xx) ─────────────────────────
 case "$HTTP_CODE" in
-  2*) NEW_CURSOR=$(( CURSOR + COUNT ))
-      echo "$NEW_CURSOR" > "$CURSOR_FILE" 2>/dev/null || true ;;
+  2*)
+    # Parse inserted count from response — only advance if events were actually inserted.
+    # Advance by SENT count (not inserted count) because we can't map inserted back to
+    # source lines. If inserted==0, something is systemically wrong — don't advance.
+    INSERTED="$(grep -o '"inserted":[0-9]*' "$RESP_FILE" 2>/dev/null | grep -o '[0-9]*' || echo "0")"
+    if [ "${INSERTED:-0}" -gt 0 ] 2>/dev/null; then
+      NEW_CURSOR=$(( CURSOR + COUNT ))
+      echo "$NEW_CURSOR" > "$CURSOR_FILE" 2>/dev/null || true
+    fi
+    ;;
 esac
 
+rm -f "$RESP_FILE" 2>/dev/null || true
+
 # Update rate limit marker
 touch "$RATE_FILE" 2>/dev/null || true