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>

docs/PROJECT_CONTEXT.md

@@ -278,6 +278,7 @@ section records only the durable architecture and operational boundaries.
 
 ## Important Decisions and Workarounds
 
+- SO2R (issue #46): `RadioSlot` FIRST/SECOND; `RadioSlotRouter` assigns RadioInfo by `RadioNr` and Win-Test STATUS by station name, everything to FIRST while `trxSynch_so2rEnabled` is off. Radio 2 writes SECONDQRG and `actualQTF2`. Rotator logic lives in `RotatorControl`, one per radio; the compatibility retry is unchanged. MO2R and multi-PC are separate projects and need their own design.
 - **Settings take effect with Apply, not while they are edited** (release 1.50,
   `docs/superpowers/specs/2026-10-16-settings-apply-drafts-design.md`): the settings window
   stages every edit in a `SettingsDraft` that the tab states read through; Apply/Close, Save