[Animal] Fix Cow milking history skips DIM = 1

[matthew7838]

Cow milking history skips DIM = 1; first record of every lactation is DIM = 2

Expected Behavior

For each new lactation, a cow's milk production history should include a record at days_in_milk = 1 representing the first day of milking after calving. The recorded DIM should align with the standard dairy convention where DIM = 1 is the first milking day.

Current Behavior

The first milking record of every lactation is written at days_in_milk = 2. DIM = 1 never appears in milk_production_history. The recorded daily production values are computed using Wood's curve at days 1..304 but stamped in the history as days 2..305, i.e. a one-day rightward shift between the curve index and the sim's DIM label. Across a full lactation, 304 daily milking records get written rather than 305.

Possible Solution

The root cause is the order of operations on the calving day inside Animal.daily_routines (RUFAS/biophysical/animal/animal.py:1641):

The cow enters the day with days_in_milk = 0 (she was dry the day before).
daily_milking_update runs first. is_milking returns self.days_in_milk > 0, so she's still flagged dry. The milking routine writes a days_in_milk = 0 record to history.
daily_reproduction_update runs next, detects the birth, and _determine_days_in_milk updates self.days_in_milk = 1.
The next sim day, milking runs with input DIM = 1, increments to 2, and writes the first real production record stamped DIM = 2.
So DIM = 1 represents the calving day with no milking event recorded for it. Two possible fixes:

Reorder the day: run reproduction (which detects calving and sets DIM = 1) before milking on the same day, so the milking step sees the cow as lactating and records DIM = 1 with that day's production.
Special-case the calving day in milking: when reproduction is about to set DIM = 1, have the milking step skip the dry-day record and instead emit a DIM = 1 record (or coordinate via a "just calved" flag).
The first option is cleaner if there are no other ordering dependencies between the two updates.

Steps to Reproduce

1. Run any simulation that has a cow going through a full dry → calving → lactation cycle.
2. Inspect cow.milk_production.milk_production_history for that cow.
3. Find the dry-off marker (days_in_milk == 0) before the new lactation begins.
4. Observe that the records immediately following the dry-off block jump from DIM = 0 (calving day) straight to DIM = 2, with no DIM = 1 record.

Context (Environment)

Detailed Description

Possible Implementation

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