feat(izh): introduce Antenna Checker module to iZH - #145
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- Implemented an Antenna Checker for the iZH module. - Updated the database to parse LEF antenna properties (gate/diff areas). - Registered the antenna extraction step into the feature telemetry pipeline.
- Implemented FileZHManager (izh_fm) to serialize detailed antenna violations to disk, matching the idrc JSON format. - Decoupled AntennaChecker internals by caching violation structs directly at the ZHInterface boundary, resolving circular dependency issues. - Updated pybind11 signatures to accept a feature_file path for explicit telemetry routing.
Rework AntennaChecker to match Cadence LEF/DEF 5.8 antenna rules so large nets scale without losing accuracy. - Sum worst-case CAR ratios rather than raw area, so merged gates keep per-gate damage accounting. - Union rectilinear geometry with an exact sweep line for precise metal area and side perimeter. - Time-stamp logical gates and conductor nodes per layer, so merging respects layer timing instead of firing at time 0. - Chain alternating metal and cut layers per ANTENNACUMROUTINGPLUSCUT. - Order edge-sort comparator fields consistently with std::tie. - Bucket edges by layer and time instead of one global sort. - Group components in flat root-indexed vectors instead of std::map. - Fast-path unions of one rect or disjoint rects.
…c_solver in AntennaChecker
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Antenna Checker (iZH): Introduces antenna checker with Tcl/Python bindings and structured JSON telemetry export.