Add generalized interdigital Q3D sweep layouts

Adds the q3d_cap generalized-capacitor layout sweep and refreshes the layout registry.

README.md

@@ -22,7 +22,7 @@ tags:
 - geometry
 pretty_name: SQuADDS Layouts
 size_categories:
-- 1K<n<10K
+- 10K<n<100K
 ---
 
 <center>
@@ -46,17 +46,17 @@ that produced it.
 
 ## Contents
 
-The current release contains 7,727 reproducible superconducting-device layouts.
+The current release contains 24,106 reproducible superconducting-device layouts.
 
 | Component | Count | Source simulation configuration | Layout provenance |
 | --- | ---: | --- | --- |
-| `GeneralizedCapNInterdigital` | 3,683 | `coupler-GeneralizedCapNInterdigital-cap_matrix` | Simulation layouts matched by `notes.source_id` |
+| `GeneralizedCapNInterdigital` | 20,062 | `coupler-GeneralizedCapNInterdigital-cap_matrix` | Matched simulation layouts; includes the `q3d_cap` Q3D sweep |
 | `CapNInterdigitalTee` | 894 | `coupler-CapNInterdigitalTee-cap_matrix` | Deterministic Qiskit Metal exports, one per database row |
 | `CavityClawRouteMeander` | 1,216 | `cavity_claw-RouteMeander-eigenmode` | Deterministic full cavity routes from nested claw, CLT-coupler, and CPW options |
 | `TransmonCross` | 1,934 | `qubit-TransmonCross-cap_matrix` | Deterministic Qiskit Metal qubit exports, one per database row |
 
-Seven supplied generalized-capacitor GDS files without matching simulation rows
-are intentionally excluded. The generalized dataset uses `north` and `south`
+The incomplete `q3d_cap_00317` export without a simulation record, matrix, or
+GDS artifact is intentionally excluded. The generalized dataset uses `north` and `south`
 as canonical terminal names; `top` and `bottom` simulation fields are retained
 in SQuADDS_DB as compatibility aliases.