Rename Go client package from mciasgoclient to mcias

- Update package declaration in client.go
- Update error message strings to reference new package name
- Update test package and imports to use new name
- Update README.md documentation and examples with new package name
- All tests pass

PROGRESS.md

@@ -4,6 +4,32 @@ Source of truth for current development state.
 ---
 All phases complete. **v1.0.0 tagged.** All packages pass `go test ./...`; `golangci-lint run ./...` clean.
 
+### 2026-03-13 — Make pgcreds discoverable via CLI and UI
+
+**Problem:** Users had no way to discover which pgcreds were available to them or what their credential IDs were, making it functionally impossible to use the system without manual database inspection.
+
+**Solution:** Added two complementary discovery paths:
+
+**REST API:**
+- New `GET /v1/pgcreds` endpoint (requires authentication) returns all accessible credentials (owned + explicitly granted) with their IDs, host, port, database, username, and timestamps
+- Response includes `id` field so users can then fetch full credentials via `GET /v1/accounts/{id}/pgcreds`
+
+**CLI (`cmd/mciasctl/main.go`):**
+- New `pgcreds list` subcommand calls `GET /v1/pgcreds` and displays accessible credentials with IDs
+- Updated usage documentation to include `pgcreds list`
+
+**Web UI (`web/templates/pgcreds.html`):**
+- Credential ID now displayed in a `<code>` element at the top of each credential's metadata block
+- Styled with monospace font for easy copying and reference
+
+**Files modified:**
+- `internal/server/server.go`: Added route `GET /v1/pgcreds` (requires auth, not admin) + handler `handleListAccessiblePGCreds`
+- `cmd/mciasctl/main.go`: Added `pgCredsList` function and switch case
+- `web/templates/pgcreds.html`: Display credential ID in the credentials list
+- Struct field alignment fixed in `pgCredResponse` to pass `go vet`
+
+All tests pass; `go vet ./...` clean.
+
 ### 2026-03-12 — Update web UI and model for all compile-time roles
 
 - `internal/model/model.go`: added `RoleGuest`, `RoleViewer`, `RoleEditor`, and