feat: canonical decomposition of complex-meromorphic functions on disks

[kebekus]

Establish the Finite Canonical Decomposition of meromorphic functions, where a complex-meromorphic function f on a disk is written as a product of an analytic function without zeros and poles, and canonical factors that take only values of norm one on the boundary of the disk.

A future PR will extend this theorem to handle zeros/poles on the boundary of the disk.

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[github-actions]

PR summary 39f5a673b2

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff

+ _root_.MeromorphicOn.congr_codiscreteWitin_closedBall_prod_canonicalFactor
+ canonicalDecomposition_aux₁
+ canonicalDecomposition_aux₂
+ canonicalDecomposition_aux₃
+ divisor_canonicalFactor
+ exists_meromorphicOrderAt_ne_top_iff_forall_mem
+ meromorphicOrderAt_canonicalFactor_ne_top
+ meromorphicOrderAt_finprod_ne_top
+ nonneg_of_mem_closedBall
+ sum_apply_smul_single_eq_self
+ zero_canonicalFactor_iff

You can run this locally as follows

## summary with just the declaration names:
./scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh contains some details about this script.

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No changes to technical debt.

You can run this locally as

./scripts/reporting/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).