chore: bump version and changelog (v0.11.17.0)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## [0.11.16.0] - 2026-03-24 — Cleaner Skill Descriptions + Proactive Opt-Out
+## [0.11.17.0] - 2026-03-24 — Cleaner Skill Descriptions + Proactive Opt-Out
 
 ### Changed
 
@@ -11,6 +11,32 @@
 
 - **Telemetry source tagging no longer crashes.** Fixed duration guards and source field validation in the telemetry logger so it handles edge cases cleanly instead of erroring.
 
+## [0.11.16.1] - 2026-03-24 — Installation ID Privacy Fix
+
+### Fixed
+
+- **Installation IDs are now random UUIDs instead of hostname hashes.** The old `SHA-256(hostname+username)` approach meant anyone who knew your machine identity could compute your installation ID. Now uses a random UUID stored in `~/.gstack/installation-id` — not derivable from any public input, rotatable by deleting the file.
+- **RLS verification script handles edge cases.** `verify-rls.sh` now correctly treats INSERT success as expected (kept for old client compat), handles 409 conflicts and 204 no-ops.
+
+## [0.11.16.0] - 2026-03-24 — Telemetry Security Hardening
+
+### Fixed
+
+- **Telemetry RLS policies tightened.** Row-level security policies on all telemetry tables now deny direct access via the anon key. All reads and writes go through validated edge functions with schema checks, event type allowlists, and field length limits.
+- **Community dashboard is faster and server-cached.** Dashboard stats are now served from a single edge function with 1-hour server-side caching, replacing multiple direct queries.
+
+### Changed
+
+- **Telemetry sync uses `GSTACK_SUPABASE_URL` instead of `GSTACK_TELEMETRY_ENDPOINT`.** Edge functions need the base URL, not the REST API path. The old variable is removed from `config.sh`.
+- **Cursor advancement is now safe.** The sync script checks the edge function's `inserted` count before advancing — if zero events were inserted, the cursor holds and retries next run.
+
+### For contributors
+
+- New migration: `supabase/migrations/002_tighten_rls.sql`
+- New smoke test: `supabase/verify-rls.sh` (9 checks: 5 reads + 4 writes)
+- Extended `test/telemetry.test.ts` with field name verification
+- Untracked `browse/dist/` binaries from git (arm64-only, rebuilt by `./setup`)
+
 ## [0.11.15.0] - 2026-03-24 — E2E Test Coverage for Plan Reviews & Codex
 
 ### Added