Silence the stove detector's queue overflow and fix notify calls in stove and HVAC blueprints

Stove: added max_exceeded: silent (mode: queued, max: 10 kept as-is) since
the ~1/s sensor cadence keeps the queue full by design. Fixed five broken
notify calls (rise, matched fall, unmatched fall, out-of-window edge, cycle
timeout) that rendered notify_target's target-selector dict into the
service name instead of resolving it, replacing each with
notify.send_message + target: !input notify_target. HVAC: same fix at its
one notify call, after confirming its notify_target input is the same
target selector.

Claude-Session: https://claude.ai/code/session_017vaW5jtjrCqhV9nUDr8mQa

hvac-failure-monitor.yaml

@@ -140,7 +140,8 @@ action:
           - choose:
               - conditions: "{{ notify_target | length > 0 }}"
                 sequence:
-                  - service: notify.{{ notify_target }}
+                  - service: notify.send_message
+                    target: !input notify_target
                     data:
                       message: >
                         HVAC '{{ hvac_action }}' action for {{ interval }} minutes showed ineffective operation.