refactor!: rename the project from Monitor to MoShiro [CI]

Namespaces, assemblies, solution, binaries, images, systemd units, config paths, environment variables, protocol methods and the Linux user are all renamed. Breaking: existing databases, node identities and installed units must be recreated.

backend/src/MoShiro.Backend.Application/Query/Bucketing.cs

@@ -0,0 +1,73 @@
+using MoShiro.Backend.Analysis;
+
+namespace MoShiro.Backend.Application;
+
+/// <summary>把源行合并成查询步长的桶：计数相加、直方图逐桶相加，所以结果是精确的，不是各点的平均。</summary>
+public sealed class BucketedRows
+{
+    public BucketedRows(long[] t, MetricSet?[] sets, int[] rowCounts)
+    {
+        T = t;
+        Sets = sets;
+        RowCounts = rowCounts;
+    }
+
+    public long[] T { get; }
+
+    public MetricSet?[] Sets { get; }
+
+    /// <summary>每个桶合并了多少个源行（用来估算持续时长和覆盖率）。</summary>
+    public int[] RowCounts { get; }
+
+    public int TotalRows => RowCounts.Sum();
+
+    public static BucketedRows Create(IReadOnlyList<SourceRow> rows, QueryRange range)
+    {
+        int n = range.Points;
+        long[] t = new long[n];
+        for (int i = 0; i < n; i++)
+        {
+            t[i] = range.FromMs + (i * range.StepMs);
+        }
+
+        var sets = new MetricSet?[n];
+        int[] counts = new int[n];
+        foreach (SourceRow row in rows)
+        {
+            long index = (row.Start - range.FromMs) / range.StepMs;
+            if (row.Start < range.FromMs || index >= n)
+            {
+                continue;
+            }
+
+            int i = (int)index;
+            if (sets[i] is null)
+            {
+                sets[i] = row.Set.Clone();
+            }
+            else
+            {
+                sets[i]!.Merge(row.Set);
+            }
+
+            counts[i]++;
+        }
+
+        return new BucketedRows(t, sets, counts);
+    }
+
+    /// <summary>整个时间段的精确合并。</summary>
+    public MetricSet Merge()
+    {
+        var merged = new MetricSet();
+        foreach (MetricSet? set in Sets)
+        {
+            if (set is not null)
+            {
+                merged.Merge(set);
+            }
+        }
+
+        return merged;
+    }
+}