fix: Clear the initialized condition state when the card is not usable (#2646)

The `initialized` state (used in conditions/triggers) was written once
and never cleared, so it meant "has this card ever been initialized"
while everything reading it took it as "is this card usable now". Home
Assistant takes a card off the page and puts it back whenever its
dashboard tab is left and returned to, so the card initialized again
while the state claimed it was initialized throughout: `trigger:
initialized` fired once per card rather than once per startup, and
automations were dropped in between.

The card lifecycle is now an explicit state machine (`SessionManager`),
the only writer of `initialized`, which separates a card that is
starting up from one initializing part of itself again while it runs. A
new `ever` parameter (conditions/triggers) selects the old latched
behaviour.

`remote_control` uses that parameter to keep its two camera priorities
correct under repeated starts. With `camera_priority: entity` the card
now re-reads the entity every time it starts, so a camera selected while
the card was away is picked up on return. With `camera_priority: card`
the card writes the entity on its first start only, unchanged, since
repeating that write would overwrite a camera the user had selected.

Closes: #2642


BREAKING CHANGE: `condition: initialized` is now `false` whenever the
card is not usable, and `trigger: initialized` fires each time the card
starts up rather than only the first time. Set `ever: true` on either to
keep the previous behaviour.

src/card.ts

@@ -360,7 +360,7 @@ export class AdvancedCameraCard extends LitElement {
   }
 
   protected updated(): void {
-    if (this._controller.getInitializationManager().isInitializedMandatory()) {
+    if (this._controller.getInitializationManager().areMandatoryAspectsInitialized()) {
       void this._controller.getQueryStringManager().executeIfNecessary();
     }
   }
@@ -461,6 +461,7 @@ export class AdvancedCameraCard extends LitElement {
             ? html`<advanced-camera-card-loading
                 .loaded=${this._controller
                   .getInitializationManager()
+                  .getSessionManager()
                   .wasEverInitialized()}
                 .effectsManager=${this._config?.performance?.features
                   .card_loading_effects !== false
@@ -503,7 +504,7 @@ export class AdvancedCameraCard extends LitElement {
           </div>
           ${this._renderMenuStatusContainer('bottom')}
           ${this._config?.elements &&
-          this._controller.getInitializationManager().isInitializedMandatory()
+          this._controller.getInitializationManager().areMandatoryAspectsInitialized()
             ? // Elements need to render after the main views so it can render 'on
               // top'. They are held until the card is initialized: the template
               // renderer loads lazily as a mandatory init aspect (when the