feat. rebuild service in Go

Rebuild the Gitea Codex review bot from the product contract with a Go HTTP service, durable SQL queue, typed Gitea client, isolated runner, and deployment updates.

Co-Authored-By: Claude <noreply@anthropic.com>

internal/commands/commands_test.go

@@ -0,0 +1,42 @@
+package commands
+
+import "testing"
+
+func TestParseSupportedCommandsAndAliases(t *testing.T) {
+	aliases := map[string]bool{"codex": true, "codex-bot": true}
+	cases := []struct{ body, name, mode string }{
+		{"@codex review", "review", "summary"},
+		{"@codex review security --full", "review", "full"},
+		{"@codex review tests", "review", "tests"},
+		{"@codex-bot explain", "explain", "summary"},
+		{"@codex --help", "help", ""},
+	}
+	for _, tc := range cases {
+		got, ok := Parse(tc.body, aliases)
+		if !ok || got.Name != tc.name || got.Mode != tc.mode {
+			t.Fatalf("Parse(%q) = %#v, %v", tc.body, got, ok)
+		}
+	}
+}
+
+func TestParsePreservesRawAndQuotedArguments(t *testing.T) {
+	got, ok := Parse("@codex review \"focus auth\" --full\nsecond line", map[string]bool{"codex": true})
+	if !ok || got.Raw != "@codex review \"focus auth\" --full\nsecond line" {
+		t.Fatalf("raw command was not preserved: %#v", got)
+	}
+	if len(got.Arguments) != 4 || got.Arguments[0] != "focus auth" || got.Arguments[1] != "--full" || got.Arguments[2] != "second" || got.Arguments[3] != "line" {
+		t.Fatalf("arguments were not lexed: %#v", got.Arguments)
+	}
+}
+
+func TestUnsupportedAndInlineCommands(t *testing.T) {
+	if _, ok := Parse("@codex fix", map[string]bool{"codex": true}); ok {
+		t.Fatal("fix must remain unsupported")
+	}
+	if DetectPrefixedCommand("Please run @codex review", map[string]bool{"codex": true}) != "" {
+		t.Fatal("inline mention must not trigger")
+	}
+	if DetectPrefixedCommand("@codex deploy now", map[string]bool{"codex": true}) != "deploy" {
+		t.Fatal("unsupported prefix was not detected")
+	}
+}