Overhaul publicreport storage layer, create unified tables

This is a huge change. I was getting really sick of the split between
nuisance/water tables when more than half of the data they store is
common. I finally bit off the big work of switching it all.

This creates a single unified table, publicreport.report and copies the
existing report data into it. It also ports existing data from the
original tables into the new table.

Along with all of this I also overhauled the system for handling
asynchronous work to use a LISTEN/NOTIFY connection from the database
and a single cache table to avoid ever losing work.

db/dbinfo/publicreport.water_image_old.bob.go

@@ -0,0 +1,132 @@
+// Code generated by BobGen psql v0.42.5. DO NOT EDIT.
+// This file is meant to be re-generated in place and/or deleted at any time.
+
+package dbinfo
+
+import "github.com/aarondl/opt/null"
+
+var PublicreportWaterImageOlds = Table[
+	publicreportWaterImageOldColumns,
+	publicreportWaterImageOldIndexes,
+	publicreportWaterImageOldForeignKeys,
+	publicreportWaterImageOldUniques,
+	publicreportWaterImageOldChecks,
+]{
+	Schema: "publicreport",
+	Name:   "water_image_old",
+	Columns: publicreportWaterImageOldColumns{
+		ImageID: column{
+			Name:      "image_id",
+			DBType:    "integer",
+			Default:   "",
+			Comment:   "",
+			Nullable:  false,
+			Generated: false,
+			AutoIncr:  false,
+		},
+		WaterID: column{
+			Name:      "water_id",
+			DBType:    "integer",
+			Default:   "",
+			Comment:   "",
+			Nullable:  false,
+			Generated: false,
+			AutoIncr:  false,
+		},
+	},
+	Indexes: publicreportWaterImageOldIndexes{
+		PoolImagePkey: index{
+			Type: "btree",
+			Name: "pool_image_pkey",
+			Columns: []indexColumn{
+				{
+					Name:         "image_id",
+					Desc:         null.FromCond(false, true),
+					IsExpression: false,
+				},
+				{
+					Name:         "water_id",
+					Desc:         null.FromCond(false, true),
+					IsExpression: false,
+				},
+			},
+			Unique:        true,
+			Comment:       "",
+			NullsFirst:    []bool{false, false},
+			NullsDistinct: false,
+			Where:         "",
+			Include:       []string{},
+		},
+	},
+	PrimaryKey: &constraint{
+		Name:    "pool_image_pkey",
+		Columns: []string{"image_id", "water_id"},
+		Comment: "",
+	},
+	ForeignKeys: publicreportWaterImageOldForeignKeys{
+		PublicreportWaterImageOldPoolImageImageIDFkey: foreignKey{
+			constraint: constraint{
+				Name:    "publicreport.water_image_old.pool_image_image_id_fkey",
+				Columns: []string{"image_id"},
+				Comment: "",
+			},
+			ForeignTable:   "publicreport.image",
+			ForeignColumns: []string{"id"},
+		},
+		PublicreportWaterImageOldPoolImagePoolIDFkey: foreignKey{
+			constraint: constraint{
+				Name:    "publicreport.water_image_old.pool_image_pool_id_fkey",
+				Columns: []string{"water_id"},
+				Comment: "",
+			},
+			ForeignTable:   "publicreport.water_old",
+			ForeignColumns: []string{"id"},
+		},
+	},
+
+	Comment: "",
+}
+
+type publicreportWaterImageOldColumns struct {
+	ImageID column
+	WaterID column
+}
+
+func (c publicreportWaterImageOldColumns) AsSlice() []column {
+	return []column{
+		c.ImageID, c.WaterID,
+	}
+}
+
+type publicreportWaterImageOldIndexes struct {
+	PoolImagePkey index
+}
+
+func (i publicreportWaterImageOldIndexes) AsSlice() []index {
+	return []index{
+		i.PoolImagePkey,
+	}
+}
+
+type publicreportWaterImageOldForeignKeys struct {
+	PublicreportWaterImageOldPoolImageImageIDFkey foreignKey
+	PublicreportWaterImageOldPoolImagePoolIDFkey  foreignKey
+}
+
+func (f publicreportWaterImageOldForeignKeys) AsSlice() []foreignKey {
+	return []foreignKey{
+		f.PublicreportWaterImageOldPoolImageImageIDFkey, f.PublicreportWaterImageOldPoolImagePoolIDFkey,
+	}
+}
+
+type publicreportWaterImageOldUniques struct{}
+
+func (u publicreportWaterImageOldUniques) AsSlice() []constraint {
+	return []constraint{}
+}
+
+type publicreportWaterImageOldChecks struct{}
+
+func (c publicreportWaterImageOldChecks) AsSlice() []check {
+	return []check{}
+}