release: v1.5.0 — discovery layer, honesty debt closed, Wave A

Tool count 131 -> 154; 474 -> 1242 collected tests.

The release exists for two measured reasons. A 149-tool catalog costs a client
~40,300 tokens before it has asked for anything, and a drafter searching the way
drafters think -- FILLET, BPOLY, QSELECT, WBLOCK -- scored df=0 against the stock
index, because those words were simply not in the data.

Discovery and batching
- DISCOVERY_MODE=search replaces the catalog with search_tools + call_tool,
  ranked over an AutoCAD command and synonym corpus (discovery/aliases.py) on
  top of fastmcp's BM25 index. Measured: 40,305 -> 356 tokens advertised.
- cad_batch runs a step list in one round trip; fields= projects result-heavy
  responses. The `core` profile is gone -- discovery replaced it.

Honesty debt (Tier 0)
- OCS/ECS: `extrusion` appeared nowhere in this codebase, so mirrored and
  rotated geometry reported coordinates that were quietly wrong. backends/ocs.py
  translates at the backend boundary; every tool coordinate is WCS on both
  engines, and a tilted plane refuses rather than answering with a number that
  looks fine.
- drawing_save_as(fmt="dwg") wrote DXF bytes to a .dwg path. drawing_audit never
  repaired. analysis_measure_area shoelaced points the caller typed in.
- ezdxf calls gained a per-call timeout, so one hung call can no longer wedge a
  server whose document lock is a single asyncio.Lock.

Architecture
- The 1854-line backend ABC is 19 contract modules; @capability(key, reason=)
  makes optional methods declarative and a gate fails on undeclared holes.
- 8 layout/viewport tools, CHSPACE, CAD_PROGID escape hatch.
- Wave A: selection filters, boundary tracing, hatch depth, annotation objects,
  measurement -- 13 tools of a planned 39. The REGION and 2D-boolean family was
  cut on evidence: add_region() yields zero ACIS bytes and the greiner_hormann
  substitute loses 28.2% of the area on a square with one semicircular edge.

Verified against a live AutoCAD 2026, which found four COM defects no amount of
reading would have caught -- AcadPViewport has no ViewCenter, and the line that
set it had been swallowed by a bare except since v1.4.

Benchmark v3 (15 tasks) and what it caught
- v2 scored this server 10/10, which carried no information: every task in it
  exercised something the server was built around. Five tasks were added because
  they can fail, and three did while being written -- a hatch could not be
  measured though the refusal listed HATCH as measurable, the boundary tools and
  the measure tool disagreed about the same shape (139.2177 vs 139.2699), and a
  circle stored as two bulged vertices measured 0.0.
- Competitor reports are NOT re-scored. They are pinned v1.4 runs against v2 and
  were never asked these five questions; the chart shows those rows `not run`.
- Correctness A/B: 21/24 -> 24/24, zero regressions.

Performance, stated plainly
The published v1.4 perf report was recorded on CPython 3.14 and the new one on
3.11.15, so the apparent 2-6x speedup is the interpreter, not this release.
Re-measured on one interpreter, v1.5.0 is 28% slower creating entities and 22%
slower on the 10k roundtrip. Fully attributed: EZDXF_CALL_TIMEOUT=0 restores
v1.4.0's exact numbers. That is the deadlock fix being paid for, the knob is
documented, and winning it back is on the 1.6 roadmap.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

benchmarks/results/published/perf-ezdxf.json

@@ -3,8 +3,8 @@
   "environment": {
     "implementation": "CPython",
     "machine": "AMD64",
-    "platform": "Windows-11-10.0.26200-SP0",
-    "python": "3.14.0"
+    "platform": "Windows-10-10.0.26200-SP0",
+    "python": "3.11.15"
   },
   "schema_version": "perf/1.0",
   "workloads": [
@@ -14,22 +14,22 @@
         "entity_count": 2000
       },
       "metric": "entities_per_second",
-      "metric_value": 3148.0,
-      "wall_ms": 635.3,
+      "metric_value": 6343.1,
+      "wall_ms": 315.3,
       "workload_id": "create_lines_2k"
     },
     {
       "description": "Create 10,000 lines, export DXF, reopen and verify",
       "detail": {
-        "build_ms": 10884.9,
+        "build_ms": 1574.1,
         "entity_count": 10000,
-        "export_ms": 1439.2,
-        "file_bytes": 1369662,
-        "reopen_ms": 1607.5
+        "export_ms": 261.8,
+        "file_bytes": 1369663,
+        "reopen_ms": 320.2
       },
       "metric": "entities_per_second",
-      "metric_value": 717.8,
-      "wall_ms": 13931.6,
+      "metric_value": 4637.9,
+      "wall_ms": 2156.1,
       "workload_id": "roundtrip_10k"
     },
     {
@@ -39,7 +39,7 @@
       },
       "metric": "entities_matched",
       "metric_value": 2500.0,
-      "wall_ms": 3434.2,
+      "wall_ms": 890.8,
       "workload_id": "region_query_10k"
     },
     {
@@ -49,7 +49,7 @@
       },
       "metric": "critique_issues",
       "metric_value": 0.0,
-      "wall_ms": 315.9,
+      "wall_ms": 176.5,
       "workload_id": "premium_pass"
     }
   ]