WS-507: Ingestion Manifest Builder prenatal exam

WS-507: Lays the groundwork for implementation of the ingestion manifest builder, using existing archive-metaproject ingestion builder as a guide. Tests have been stubbed out and classes created.

apps/cli/executables/pexable/ingest_envoy/ingest_envoy/classes.py

+""" Objects pertaining to the various ingestion manifests """
+
+from enum import Enum
+
+
+class Telescope(Enum):
+    """Codifying the names of our telescopes, because Janet can't abide magic strings"""
+
+    VLA = 1
+    EVLA = 2
+    ALMA = 3
+    VLBA = 4
+    GBT = 5
+    NONE = 6
+
+
+class IngestionType(Enum):
+    """Types of ingestion we'll have to do"""
+
+    # ALMA products
+    ALMA_SDM = Telescope.ALMA
+    ALMA_CAL = Telescope.ALMA
+    ALMA_AUDI = Telescope.ALMA
+
+    # EVLA products
+    EVLA_SDM = Telescope.EVLA
+    EVLA_BDF = Telescope.EVLA
+    EVLA_CAL = Telescope.EVLA
+
+    # RealFast projects
+    REALFAST_SDM = Telescope.EVLA
+
+    # VLASS projects
+    VLASS_QUICKLOOK = Telescope.EVLA
+
+    # VLBA ingestion. (IDI and UVFITS products are treated the same.)
+    VLBA_FITS = Telescope.VLBA
+
+    # Coming Real Soon Now: VLBA Mark 4 product ingestion
+    VLBA_MARK4 = Telescope.VLBA
+
+    # Also coming Real Soon: GBT execution block ingestion
+    GBT_EB = Telescope.GBT
+
+    # Hot on its heels: LVLA execution block ingestion
+    LVLA_EB = Telescope.VLA
+
+    # When we just don't know what we're dealing with
+    UNKNOWN = Telescope.NONE