#1794 setup_intel.py: sycl_version() returns "0", so setup refuses UD-IQ4_XS and UD-Q4_K_XL on Intel

Description

**Environment**
- Ubuntu 26.04.1, kernel 7.0.0-34, 2× Intel Arc Pro B70 (`xe`)
- compute-runtime 26.31.39395.14, oneAPI DPC++ 2026.1.1
- Native build (no Docker), AOT `-DSTRATA_SYCL_AOT=bmg-g31`
- Strata `fb58e0d` (v0.1.41)

**Summary**
`sycl_version()` reads the version with a regex from `sycl/CMakeLists.txt`. That file no longer contains a literal
version number, so the function returns `"0"`. `"0"` goes into the stub `BUILD.json`, and the engine-version gate in
`setup.py` then refuses every model with an `"engine"` minimum.

**Code**
- `sycl/setup_intel.py:103-105`
  ```python
  def sycl_version() -> str:
      m = re.search(r"project\(\s*\S+\s+VERSION\s+([\d.]+)", (ROOT / "sycl" / "CMakeLists.txt").read_text())
      return m.group(1) if m else "0"
  ```
- `sycl/CMakeLists.txt:21`: `project(strata_sycl VERSION ${STRATA_SYCL_VERSION} LANGUAGES C CXX)`. The version
  comes from the top-level `CMakeLists.txt` (lines 14-19) and is a variable here, so `[\d.]+` never matches.
- `sycl/setup_intel.py:207` writes `{"version": sycl_version(), ...}` into the stub `BUILD.json`. Line 234 hands
  that stub to setup as the engine.
- `setup.py:5241-5246` parses `"0"` as `(0,)` and compares it with `MODELS[model]["engine"]`: `(0, 1, 38)` for
  UD-IQ4_XS (`setup.py:232`) and `UNSLOTH_ENGINE = (0, 1, 32)` for UD-Q4_K_XL (`setup.py:256`).

**Repro**
```
./setup.sh --backend sycl      # pick UD-IQ4_XS (or UD-Q4_K_XL)
```

**Expected:** setup accepts the model, since the engine being built is 0.1.41.

**Actual:**
```
UD-IQ4_XS needs engine 0.1.38 or newer; this one is 0
```
UD-Q4_K_XL fails the same way.

**Workaround used:** a wrapper that sets the version from the top-level `project(strata VERSION x)` before setup runs.

**Suggested fix:** read the version the same way `sycl/CMakeLists.txt` does, from the top-level `CMakeLists.txt`,
and keep the literal fallback:
```python
def sycl_version() -> str:
    for p, rx in ((ROOT / "CMakeLists.txt", r"^project\(strata VERSION ([\d.]+)"),
                  (ROOT / "sycl" / "CMakeLists.txt", r"set\(STRATA_SYCL_VERSION ([\d.]+)\)")):
        m = re.search(rx, p.read_text(), re.M)
        if m:
            return m.group(1)
    return "0"
```
**Related:** none found. Open PR #1390 edits `sycl/setup_intel.py` (native Windows) but does not touch
`sycl_version()`.

Also consider making `"0"` fail loudly. A version that cannot be parsed should be a setup error, not a version older
than every model's minimum. A unit test that asserts `sycl_version() != "0"` on the repo would catch the next
regression.