close guardrail gaps and fix the scoring pipeline top to bottom

Constraint resolver: aggregate mass/footprint across a combo instead of
pairwise-only checks, treat medium/atmosphere as agreement not supply/demand,
reduce multi-provider checks by best/sum instead of AND-ing every provider,
fail closed on unrecognized mutex values, add a propulsion-viability
(thrust-to-weight) rule. Seed data updated to match (nuclear/solar-sail
footprint floors, water-medium exclusions, explicit ground/gravity providers).

Domain metric units were stored globally per metric name instead of
per-domain, silently corrupting cost_efficiency for every domain but the
first one seeded — fixed with a schema migration.

Stub estimator's cost_efficiency/safety/availability/reliability were a
backwards formula and flat constants; replaced with heuristics grounded in
each entity's thrust_profile/energy_form/infrastructure.

LLM estimate_physics() now receives each metric's unit and expected range
instead of a bare name, fixing wildly miscalibrated estimates traced back to
the prompt's own hardcoded example anchoring the model to the wrong order of
magnitude. Sharpened the safety-estimation and plausibility-review prompts.
Deduped provider parsing logic into llm/parsing.py.

Web pipeline form can now pick an LLM provider per run instead of only via
server env var.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/conftest.py

@@ -35,7 +35,9 @@ def road_vehicle():
         description="Generic wheeled road vehicle",
         dependencies=[
             Dependency("environment", "ground_surface", "true", None, "requires"),
+            Dependency("environment", "ground_surface", "true", None, "provides"),
             Dependency("environment", "gravity", "true", None, "requires"),
+            Dependency("environment", "gravity", "true", None, "provides"),
             Dependency("physical", "mass", "36000", "kg", "range_max"),
             Dependency("physical", "mass", "50", "kg", "range_min"),
             Dependency("environment", "medium", "ground", None, "requires"),
@@ -51,7 +53,9 @@ def bicycle():
         description="Two-wheeled human-scale vehicle",
         dependencies=[
             Dependency("environment", "ground_surface", "true", None, "requires"),
+            Dependency("environment", "ground_surface", "true", None, "provides"),
             Dependency("environment", "gravity", "true", None, "requires"),
+            Dependency("environment", "gravity", "true", None, "provides"),
             Dependency("physical", "mass", "30", "kg", "range_max"),
             Dependency("environment", "medium", "ground", None, "requires"),
         ],