zone log verbosity - #3613

…3770)

AngularFire wrapped beforeAuthStateChanged so that registering the
hook added a pending task, cleared only when the callback first runs.
Firebase runs that callback only on a sign-in or sign-out, so for a
visitor who does neither the app never became stable. Registered on
the server, it failed ng build during route extraction and left
server-rendered requests without a response.

This restores the blockUntilFirst: false override from #3590, which
#3613 dropped without comment while adding log-level overrides next
to it. The callback still runs inside Angular's zone and injection
context, and its returned promise still reaches Firebase, so a
rejection still cancels the sign-in. A call outside an injection
context now logs its per-call warning only at the verbose level, as
onMessage does.

Fixes #3748

docs(auth): scope the beforeAuthStateChanged note to rc.1 and earlier

Merging this change closes #3748, so the section's present-tense note
would point at a closed issue. Also removed the false claim that the
@angular/fire/auth import makes ng build hang: the guide registers the
hook only in the browser, so its own build succeeds.

…ngular#3770)

AngularFire wrapped beforeAuthStateChanged so that registering the
hook added a pending task, cleared only when the callback first runs.
Firebase runs that callback only on a sign-in or sign-out, so for a
visitor who does neither the app never became stable. Registered on
the server, it failed ng build during route extraction and left
server-rendered requests without a response.

This restores the blockUntilFirst: false override from angular#3590, which
angular#3613 dropped without comment while adding log-level overrides next
to it. The callback still runs inside Angular's zone and injection
context, and its returned promise still reaches Firebase, so a
rejection still cancels the sign-in. A call outside an injection
context now logs its per-call warning only at the verbose level, as
onMessage does.

Fixes angular#3748

docs(auth): scope the beforeAuthStateChanged note to rc.1 and earlier

Merging this change closes angular#3748, so the section's present-tense note
would point at a closed issue. Also removed the false claim that the
@angular/fire/auth import makes ng build hang: the guide registers the
hook only in the browser, so its own build succeeds.

The docs/auth.md change is left out, since it edits a section of the
guide that 20.1.x does not have.

(cherry picked from commit f182972)

…3770)

AngularFire wrapped beforeAuthStateChanged so that registering the
hook added a pending task, cleared only when the callback first runs.
Firebase runs that callback only on a sign-in or sign-out, so for a
visitor who does neither the app never became stable. Registered on
the server, it failed ng build during route extraction and left
server-rendered requests without a response.

This restores the blockUntilFirst: false override from #3590, which
#3613 dropped without comment while adding log-level overrides next
to it. The callback still runs inside Angular's zone and injection
context, and its returned promise still reaches Firebase, so a
rejection still cancels the sign-in. A call outside an injection
context now logs its per-call warning only at the verbose level, as
onMessage does.

Fixes #3748

docs(auth): scope the beforeAuthStateChanged note to rc.1 and earlier

Merging this change closes #3748, so the section's present-tense note
would point at a closed issue. Also removed the false claim that the
@angular/fire/auth import makes ng build hang: the guide registers the
hook only in the browser, so its own build succeeds.

The docs/auth.md change is left out, since it edits a section of the
guide that 20.1.x does not have.

(cherry picked from commit f182972)

ɵzoneWrap holds a pending task from the moment a wrapped call gets a
callback until that callback first runs. For onLog, onTokenChanged,
the Database child listeners (onChildAdded on an empty node, the other
three until a later change), off, enableLogging, and the rxfire
streams stateChanges and auditTrail, nothing guarantees that first
run, so ApplicationRef.isStable can stay false for good and an SSR
build's route extraction times out, as #3748 reported for
beforeAuthStateChanged. They keep logLevel WARN, so only the pending
task changes.

isSupported in remote-config is the twelfth: #3613 put its
blockUntilFirst: false entry in the rxfire block, which exports no
isSupported, so it never applied, and #3759 removed the dead entry.

Server renders no longer wait for onChildAdded's first batch (onValue,
object and list still wait), and off(ref, type, cb) still detaches
nothing, because the wrapper replaces the callback it is given.

fromRef takes the event to listen for, and one blockUntilFirst value
cannot fit both uses: value always fires on attach, while a child event
may never fire. A hand-written fromRef in overrides.ts wraps rxfire's
fromRef both ways and picks by event, so
fromRef(ref, ListenEvent.value) holds a server render like object(ref)
and child events do not.

Fixes #3826