[TheeCoderAhmed]

Part of #204.

Failure. Six JSON stores read their file with an unguarded json.loads in the constructor, and SessionManager.__init__ builds them all at startup. One truncated file (a save cut off by a crash or a full disk) raises straight out of the constructor, so the server won't start until the user finds and deletes the file. To reproduce:

from pathlib import Path
from coworker.unrouted import UnroutedStore

Path("state.json").write_text('{"items": [')
UnroutedStore("state.json")
# json.decoder.JSONDecodeError: Expecting value: line 1 column 12 (char 11)

Fix. InboxStore, InboxRouting, UnattendedRegistry, WakeStore, SubscriptionStore and UnroutedStore now use the same guard as MentionSessionStore (#690): catch (OSError, ValueError, TypeError, AttributeError), log a warning, and start empty. A half-read file doesn't leave partial state behind.

Left out on purpose:

• PersonaConnectionStore, SessionConnectionStore and overrides.py. Starting empty there isn't neutral: a muted connector goes back to on, and a raised tool risk is dropped. That looks like your call, so I didn't guess.
• The non-atomic write_text in _save. It's the other half of Corrupt JSON state files crash server startup across the whole store layer (not just WakeStore/#158) #204, and I kept this PR to the load side.

WakeStore is in scope because selfwake.py still has the unguarded load on main, even though #159 was closed with "main already has the logic".

Validation. New tests/test_store_robustness.py covers a truncated file, an empty file, null, a JSON string, and records with unknown fields.

main:         27 failed, 1 passed
this branch:  28 passed

pytest tests/test_store_robustness.py tests/test_inbox.py tests/test_inbox_routing.py \
  tests/test_self_wake.py tests/test_subscriptions.py tests/test_unattended.py \
  tests/test_attendance_auto.py tests/test_wake_resume.py tests/test_mention_store_robustness.py
105 passed

I ran those focused files with .[dev] on Python 3.12, not the full suite. A screenshot doesn't apply: this has no UI change.