Add project cycle stats to player stats history

[heyheyjp]

Depends on #365.
Forked from features/project-stats-model.

Currently persisting:

• Aggregate Build Cycles (ECC)
• Relative Contribution (RC)
• Estimated Contribution Cycles (ECC)

Add the following:

• Hours worked
• Expected contribution
• Expected contribution delta
• Culture contribution score
• Learning support score

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Expected Contribution (Percentage)

ROUND([Personal Hours] / [Total Team Hours] * 100)

Expected Contribution Delta

Expected Contribution - Relative Contribution

Culture Contribution

Find all CULTURE_CONTRIB scores for this project for that player
Calculate the average score
Subtract 1
Convert to % (divide by 6)

Learning Support

Find all LEARNING_SUPPORT scores for this project for that player
Calculate the average score
Subtract 1
Convert to % (divide by 6)

In this example, this is all retro feedback for a single project:

Feedback Type	Feedback from	Feedback to	Score
Culture	Shereef	SJ	5
Learning	Shereef	SJ	6
Culture	Jeffrey	SJ	6
Learning	Jeffrey	SJ	7

Culture Contribution for SJ = ((((5+6)/2) - 1 ) / 6) = 75%
Learning Contribution for SJ = ((((6+7)/2) - 1 ) / 6) = 91.666%

Let's round to zero decimals.

1. Score doesn't need to be weighted by hours or "recentness" since it only covers 1 project.
2. Scores are from 1 to 7 so shifting them to 0 to 6 gives us the whole range of 0 to 100%.