fix(server): wrap the shared client-name alternation like claudewatcher does (#209)

The deployment injects CLAUDE_INGEST_CLIENT_BLOCK as a bare alternation of client
names; claudewatcher compiles it as (?i)\b(...)\b. The raw/ router used it raw, so
a short client name would match inside ordinary words and park clips that have
nothing to do with the client. INGEST_CLIENT_BLOCK stays a full regexp, used as
is. Mutation-checked.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

ingestion/cmd/server/main_test.go

@@ -3,6 +3,7 @@ package main
 
 import (
 	"context"
+	"github.com/mathiasbq/hyperguild/ingestion/internal/wing"
 	"log/slog"
 	"os"
 	"path/filepath"
@@ -129,3 +130,41 @@ func TestEnvFlag(t *testing.T) {
 		})
 	}
 }
+
+// The deployment injects CLAUDE_INGEST_CLIENT_BLOCK as an ALTERNATION OF CLIENT
+// NAMES that claudewatcher wraps in \b(...)\b. Used raw, a short name would match
+// inside ordinary words and park half the clips.
+func TestIngestClientPattern(t *testing.T) {
+	get := func(m map[string]string) func(string) string { return func(k string) string { return m[k] } }
+	tests := []struct {
+		name string
+		env  map[string]string
+		want string
+	}{
+		{"nothing set", map[string]string{}, ""},
+		{"explicit pattern is a full regexp, used as is", map[string]string{"INGEST_CLIENT_BLOCK": `acme\s+corp`, "CLAUDE_INGEST_CLIENT_BLOCK": "other"}, `acme\s+corp`},
+		{"the shared client-name alternation is wrapped like claudewatcher wraps it", map[string]string{"CLAUDE_INGEST_CLIENT_BLOCK": "dif|trucker"}, `\b(dif|trucker)\b`},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, ingestClientPattern(get(tt.env)))
+		})
+	}
+}
+
+func TestIngestClientPattern_AShortClientNameDoesNotParkOrdinaryWords(t *testing.T) {
+	pattern := ingestClientPattern(func(k string) string {
+		if k == "CLAUDE_INGEST_CLIENT_BLOCK" {
+			return "dif|trucker"
+		}
+		return ""
+	})
+	r, err := wing.NewRouter(t.TempDir(), "web-clip", pattern)
+	require.NoError(t, err)
+	d := r.Resolve(context.Background(), wing.Note{Text: "a different approach to modifying prompts"})
+	assert.Equal(t, wing.Default, d.Source, "'dif' inside 'different' and 'modifying' is not the client")
+	d = r.Resolve(context.Background(), wing.Note{Text: "kickoff for the DIF project next week"})
+	assert.Equal(t, wing.Exception, d.Source)
+	d = r.Resolve(context.Background(), wing.Note{Text: "Trucker, the client, asked for"})
+	assert.Equal(t, wing.Exception, d.Source)
+}