Major enhancement: System now learns actual combo finisher durations and
saves them per combo point level (1-5 CP).
**New SavedVariable:**
- CleveRoids_ComboDurations[spellID][comboPoints] = duration
- Persists between sessions
- Uses learned durations before calculated formulas
**ComboPointTracker.lua:**
- Added GetLearnedComboDuration(spellID, cp) - fetch learned duration
- Updated CalculateComboScaledDurationByID to check learned first
- Falls back to formula if not learned yet
**Utility.lua (libdebuff):**
- UNIT_CASTEVENT handler stores combo points in learnCastTimers
- RAW_COMBATLOG fade handler learns combo durations when spells expire
- Stores learned duration keyed by [spellID][comboPoints]
- Debug message shows "Learned combo spell X at Y CP = Zs"
**Core.lua:**
- New command: /cleveroid combolearn - Show all learned combo durations
- Lists each spell with all learned CP levels (1-5)
- Shows which durations have been learned vs not yet
**Benefits:**
- Debuff conditionals like [debuff:Rip<4] now use ACTUAL max duration
- Accounts for talents that modify finisher durations
- Learns different durations per rank
- More accurate than formulas for edge cases
**Example:**
After casting Rip with 5 CP and letting it expire, system learns:
CleveRoids_ComboDurations[1079][5] = 28
Future casts use 28s instead of calculated 12+4*4
ComboPointTracker.lua calls CleveRoids.RegisterExtension() but was loading
before ExtensionsManager.lua where that function is defined.
Moved ComboPointTracker.lua to load after ExtensionsManager.lua.
This fixes the 'attempt to call field ShowComboTracking (a nil value)' error.
Jrc13245