refactor(plugin-sdk): remove channel-specific sdk seams

scripts/lib/plugin-sdk-entrypoints.json

@@ -16,11 +16,13 @@
   "config-runtime",
   "reply-runtime",
   "reply-dispatch-runtime",
+  "reply-reference",
   "reply-chunking",
   "reply-payload",
   "channel-reply-pipeline",
   "channel-runtime",
   "interactive-runtime",
+  "outbound-media",
   "outbound-runtime",
   "infra-runtime",
   "runtime-config-snapshot",
@@ -85,14 +87,6 @@
   "diagnostic-runtime",
   "diagnostics-otel",
   "diffs",
-  "discord",
-  "discord-account",
-  "discord-core",
-  "discord-runtime-surface",
-  "discord-session-key",
-  "discord-surface",
-  "discord-thread-bindings",
-  "discord-timeouts",
   "error-runtime",
   "extension-shared",
   "channel-config-helpers",
@@ -197,17 +191,7 @@
   "param-readers",
   "provider-zai-endpoint",
   "secret-input",
-  "signal",
-  "signal-account",
-  "signal-surface",
   "channel-status",
-  "slack",
-  "slack-account",
-  "slack-core",
-  "slack-runtime-surface",
-  "slack-surface",
-  "slack-target-parser",
-  "slack-targets",
   "status-helpers",
   "speech",
   "sglang",
@@ -215,11 +199,6 @@
   "string-normalization-runtime",
   "state-paths",
   "synthetic",
-  "telegram-account",
-  "telegram-command-config",
-  "telegram-allow-from",
-  "telegram-core",
-  "telegram-surface",
   "thread-ownership",
   "tlon",
   "tool-send",
@@ -233,11 +212,6 @@
   "web-media",
   "voice-call",
   "volcengine",
-  "whatsapp-auth-presence",
-  "whatsapp-core",
-  "whatsapp-shared",
-  "whatsapp-surface",
-  "whatsapp-targets",
   "zalo",
   "zalo-setup",
   "zalouser",