SO2R: two radios in one instance (#46) (#137)

* Spec: SO2R with two radios in one instance (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Plan: SO2R implementation (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Move the rotator command rules into RotatorControl (#46)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

* Store the SO2R switch, the second Win-Test station and rotator 2 (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Route frequency reports to radio 1 or 2 (#46)

Add the RadioSlot enum (FIRST, SECOND) with its QRG and QTF targets, and
the pure RadioSlotRouter that decides per RadioInfo packet and per
Win-Test station which radio a report belongs to.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Send RadioInfo of radio 2 to SECONDQRG when SO2R is on (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Send Win-Test STATUS of the second station to SECONDQRG when SO2R is on (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Run a second PSTRotator for radio 2 with SO2R (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Start rotator 2 only while an ON4KST session runs (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Settings for SO2R, the second Win-Test station and rotator 2 (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Turn antenna 2 and show QTF2 with SO2R (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Make the SO2R switches observable so Apply shows them (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Document SO2R (#46)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Refuse clashing PSTRotator ports in both directions (#46)

Writing either port now checks same-or-adjacent against the drafted value of
the other; rotor 1 is only checked while SO2R and rotor 2 are on. Also fixes
a misplaced Javadoc, stale WinTest parseStatus Javadoc, docs wording and
removes an unused import and dead comment.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Remove the executed SO2R plan (#46)

The plan's content lives on in the commits, the spec and PROJECT_CONTEXT.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

github_docs/en-Changelog.md

@@ -30,6 +30,8 @@ Several operators sharing one computer can now use their own callsigns, locators
 
 - **Own site height and highest point of the remote square in the path analysis:** the **Station** tab has two new settings in its path-analysis section. **Own ground height ASL, metres** replaces the elevation-model value at the own locator centre by the height of the actual site; left empty, the elevation model decides as before. **Target station on the highest point of its locator square**, on by default, ends the path at the highest of 25 sampled points of the remote locator square instead of at its centre, because contest stations usually operate from the high ground of their square. The lookup costs one additional request to the elevation service per remote square and session; if it fails, the analysis uses the square centre as before.
 
+- **SO2R with two radios:** the new option **SO2R** on the **TRX sync** tab (off by default) keeps two radios apart. N1MM, DXLog and UCXLog are assigned by `RadioNr`: radio 1 updates MYQRG, radio 2 updates SECONDQRG. For Win-Test, enter one station name per radio. A second PSTRotator (own host and port, on the **Station** tab) adds **Turn ant2** next to **Turn ant1** and a QTF2 field next to QTF. Without SO2R everything stays as before. This implements the first part of [Issue #46](https://github.com/praktimarc/kst4contest/issues/46).
+
 ### Changed
 
 - **The terrain profile cache is separate:** computed terrain profiles now live in their own shared file `terrainprofilecache.db` and are stored per owner. Previously the whole cache was dropped whenever the callsign or locator changed, which would have discarded every computed profile on each profile switch.