timeconditions: office hours, holidays, override codes, weekly grid

/api/time-conditions (company time zone by default, ranges validated,
unique override digit, never pointing at itself) with a live status
("open/closed/holiday now", same logic as the dialplan, shared), and
POST /:id/override, which writes PostgreSQL then AstDB SP/TCOVR.
/api/holidays CRUD plus import-us-federal (observed dates, computed in
code, skips days already listed). services/astdb.ts resyncs AstDB on
every AMI connect (PostgreSQL wins); services/toggles.ts applies
SpToggle TCOVR from *31N/*32N/*33N.

Generator: sp-tc-{id} per 03 §6.10 (override, holidays within the next
year, ranges rendered a minute short because GotoIfTime's end is
inclusive), sp-tc-override with a no-service fallback, admin-only
*3[123]X in sp-featurecodes, destApp time_condition. The date changing
in the company time zone triggers a forced apply so holidays roll over.
Golden cases holidays and ivr-business-hours.

Office hours page: click-and-drag half-hour grid plus an exact range
list, destinations, holiday destination, override key, status chip with
Force open / Force closed / Automatic; Holidays tab with the US federal
import. e2e m6-t4 found two bugs (pointer capture release throwing,
drawer overflow) and checks routing, AstDB, *321/*331 from an admin
phone, refusal for others, and the import reaching the dialplan.

Task: M6-T4

apps/api/src/generator/dialplan/static.ts

@@ -88,7 +88,7 @@ exten => _X!,1,Answer()                ; X! also matches "0" (caller unknown)
  same => n,SayDigits(\${EXTEN})
  same => n,Hangup()
 
-; ─── Feature codes (03 §6.13). M4: voicemail only; M6-T7 adds the rest.
+; ─── Feature codes (03 §6.13). M4: voicemail; M6-T4: office hours overrides; M6-T7 adds the rest.
 [sp-featurecodes]
 exten => *97,1,Answer()                                     ; my voicemail
  same => n,VoiceMailMain(\${SP_EXT}@default)
@@ -96,6 +96,12 @@ exten => *97,1,Answer()                                     ; my voicemail
 exten => *98,1,Answer()                                     ; any voicemail (asks mailbox)
  same => n,VoiceMailMain(@default)
  same => n,Hangup()
+; time condition overrides *31N open, *32N closed, *33N auto (admins only)
+exten => _*3[123]X,1,Answer()
+ same => n,GotoIf($["\${GLOBAL(SP_TCADMIN_\${SP_EXT})}" != "1"]?deny)
+ same => n,Goto(sp-tc-override,\${EXTEN},1)
+ same => n(deny),Playback(ss-noservice)
+ same => n,Hangup()
 
 [sp-vm-direct]
 exten => _X.,1,Answer()