Card database updates ran invisibly: MTGJSON parsing spun an indeterminate
bar on the UI thread and the set import blocked the window, while the
onboarding wizard spawned `oracle -b` with no progress to show at all.
- Add byte-level scan progress to `RawJson::scanSetRanges` via an optional
callback, throttled to ~100 reports per scan.
- Emit `OracleImporter::dataReadProgress` during the scan and import sets on a
worker thread, driving the wizard's progress bar per set.
- With `-b`, write machine-readable `PROGRESS <stage> <done> <total>` lines to
stdout for the download/scan/import stages; stderr keeps the log output.
- Parse the oracle stdout in `MainWindow` and forward it to the onboarding
wizard, giving the card database step a determinate bar with stage-specific
status text.
- Guard the async workers against the wizard being closed mid-run.
- Add Google Test coverage for scan progress reporting.
* [Oracle] Parse sets lazily to slash importer peak memory
- Add a raw JSON scanner that splits the document into per-set byte ranges
without materializing the JSON tree
- Keep only the raw document bytes and parse one set at a time in startImport
- Take readSetsFromByteArray by value so the wizard's buffer is moved, not copied
- Clear the retained raw data in releaseSetData()/clear()
- Cover the scanner and lazy parsing with tests
Took 2 minutes
* [Oracle] Fix nesting-depth cap, tolerate unescaped control chars, lazy-parse review fixes
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Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>
