fc-speech-align: v3 — emit FlowerCore.Shared.Speech word contract

The /align endpoint was returning Whisper-native word fields
(word/startSeconds/endSeconds/confidence), but FlowerCore.Shared.Speech's
FasterWhisperAlignmentClient on master deserializes
FasterWhisperWord against [JsonPropertyName("text")/("startMs")/("endMs")].
Result: ttsreader-web reported alignment.source="whisper" with words[]
present but every entry had Text="" and StartMs=EndMs=0 — visible in the
2026-04-25 hello-world smoke against ttsreader.iamworkin.lan.

Match the published Common contract instead of the Python model's native
shape: emit text/startMs/endMs (millisecond ints, not float seconds).
Confidence stays on the wire as informational; the deployed C# client
ignores it but a future fc-align operator UI can surface low-confidence
words. Bump tag to v3 and bump the Deployment image accordingly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/fc-ttsreader/fc-ttsreader.yaml

@@ -169,7 +169,7 @@ spec:
         runAsUser: 1654
       containers:
         - name: align
-          image: localhost/fc-speech-align:v2
+          image: localhost/fc-speech-align:v3
           imagePullPolicy: Never
           ports:
             - containerPort: 9200