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[TimBartholomew]

Summary

This PR removes repeated console spam during batch PHREEQC runs and fixes the underlying Alkalinity MW handling that was triggering it.

The repeated messages came from two places:

• an unconditional database load print on every phreeqcWTapi instantiation
• repeated MW recomputation for Alkalinity, even when the metadata already had a valid stored MW for the intentional formula Ca0.5(CO3)0.5

That second path could fail to parse the formula and fall back noisily, which is why repeated PW_TEA runs produced the typo-heavy warning many times.

What changed

• Replaced the unconditional Loading database file: ... console print with debug logging, so default behavior is quiet.
• Removed the normal-operation stdout warning for MW fallback and routed that path through debug logging instead.
• Updated master-species MW handling so check_formula_consistent() reuses the existing stored MW when:
  • the formula has not changed, and
  • the metadata already contains an MW
• Added explicit handling for the known Alkalinity formula Ca0.5(CO3)0.5 with MW 50.05 during metadata-derived MW calculation.
• Preserved direct Alkalinity input support.
• Kept the existing CaHCO3 helper behavior that emits both inorganic carbon and alkalinity when requested.
• Avoided reintroducing the earlier direct-Alkalinity behavior that duplicated carbon master-species lines and perturbed pH.

Behavior impact

This is not only output suppression.

It also fixes the underlying Alkalinity MW/formula path so normal direct Alkalinity usage no longer attempts an unnecessary recomputation and no longer falls into the noisy fallback path.

Public behavior is otherwise intended to remain stable:

• no input API changes
• no required verbosity flag changes for callers
• no intentional command log structure changes

Tests

Added regression coverage for:

• direct Alkalinity input still generating only the alkalinity line
• direct Alkalinity input reusing metadata MW without console output
• repeated phreeqcWTapi(database="phreeqc.dat") instantiation staying quiet by default
• existing CaHCO3 helper behavior still generating both carbon and alkalinity lines

Validated locally with:

• pytest src/phreeqcinwt/tests/test_solution_build.py -k "direct_alkalinity or repeated_instantiation or cahco3"
• runtime repeated-instantiation check with direct Alkalinity input and no console output
• python -m black --check src/phreeqcinwt/core/data_base_utils.py src/phreeqcinwt/core/utility_functions.py src/phreeqcinwt/tests/test_solution_build.py

[avdudchenko]

This looks good. @TimBartholomew Please updated with latest main change and re-run tests. Not sure why its not letting me auto push latest changes into this pr...