Switch monthly phase close-ups to NASA SVS Dial-a-Moon at fullscreen

The previous east-flavored composite (tight-crop east region + lunar
texture overlay) was honest but visually limited: 38-px source moon, no
real terminator shadows on quarters, and a faint upscaled-halo
background that was less compelling than just a clean lunar render.

New flow:
- East stays the witness (verifies the moon was visible during the
  collection window) and supplies the timestamp.
- moon_dialamoon.py fetches the NASA SVS Dial-a-Moon render for that
  exact UTC hour. Free, public-domain, real-physics: correct phase,
  libration, and crater shadows for any timestamp.
- moon_composite.render_phase_closeup() places that render at ~92% of
  frame height on a 1920x1080 black background -- the long-telephoto
  look the user asked for.
- One API call per phase event (~36/year), cached forever in
  moon-ref/dialamoon/.

Quarter moons now show real 3D crater shadows along the terminator,
which the prior algorithmic phase-shadow couldn't simulate from a
full-moon reference.

Adds MOON_REQUIRE_EAST_VERIFY=true|false toggle so the user can choose
"only post when east saw it" (default, current behavior) vs "post every
cycle regardless of weather over east."

Drops the install-time lunar reference download (no longer needed) and
the now-unused per-phase phase-shadow path stays in moon_composite.py
for reference / future reuse.

https://claude.ai/code/session_015PBVDESC3KLMbq1LpA6qLn

install.sh

@@ -243,25 +243,11 @@ if [ "${MOON_TRACK_ENABLED:-true}" = "true" ] || [ "${MOON_FULL_ENABLED:-true}"
         fi
     fi
 
-    # Lunar reference texture for moon_phase_monthly.py.  Default URL is the
-    # Wikipedia "FullMoon2010" by Gregory H. Revera (CC BY-SA 3.0), 3500×3500.
-    # Override MOON_REFERENCE_URL in .env to use a different source — any
-    # high-res photo of a full moon on a black background works.
-    ref_dir="${MOON_REFERENCE_DIR:-$HERE/moon-ref}"
-    ref_path="${MOON_REFERENCE_PATH:-$ref_dir/full-moon.jpg}"
-    ref_url="${MOON_REFERENCE_URL:-https://upload.wikimedia.org/wikipedia/commons/e/e1/FullMoon2010.jpg}"
-    if [ ! -f "$ref_path" ]; then
-        mkdir -p "$(dirname "$ref_path")"
-        echo "Downloading lunar reference texture..."
-        if curl -fsSL -o "$ref_path" "$ref_url"; then
-            echo "  ok → $ref_path"
-        else
-            echo "  WARNING: lunar reference download failed"
-            echo "           Drop a high-res full-moon JPEG at $ref_path manually,"
-            echo "           or set MOON_REFERENCE_URL in .env and re-run install.sh."
-            rm -f "$ref_path"
-        fi
-    fi
+    # NASA SVS Dial-a-Moon images are fetched on demand by moon_dialamoon.py
+    # the first time each phase event is processed (~once per phase per month,
+    # ~36 calls/year), cached forever in moon-ref/dialamoon/.  No bulk
+    # download needed at install time.
+    mkdir -p "${MOON_DIALAMOON_CACHE_DIR:-$HERE/moon-ref/dialamoon}"
 fi
 
 # Nightly moon-track job — runs on the SUNRISE_CAM only.