fix(pipeline): make availability chain incremental + fix supervisor

Convert the availability chain (stg_playtomic_availability →
fct_availability_slot → fct_daily_availability) from FULL to
INCREMENTAL_BY_TIME_RANGE so sqlmesh run processes only new daily
intervals instead of re-reading all files.

Supervisor changes:
- run_transform(): plan prod --auto-apply → run prod (evaluates
  missing cron intervals, picks up new data)
- git_pull_and_sync(): add plan prod --auto-apply before re-exec
  so model code changes are applied on deploy
- supervisor.sh: same plan → run change

Staging model uses a date-scoped glob (@start_ds) to read only
the current interval's files. snapshot_date cast to DATE (was
VARCHAR) as required by time_column.

Clean up redundant TRY_CAST(snapshot_date AS DATE) in
venue_pricing_benchmarks since it's already DATE from foundation.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

infra/supervisor/supervisor.sh

@@ -33,10 +33,10 @@ do
         DUCKDB_PATH="${DUCKDB_PATH:-/data/padelnomics/lakehouse.duckdb}" \
             uv run --package padelnomics_extract extract
 
-        # Transform — plan detects new/changed models; run only executes existing plans.
+        # Transform — run evaluates missing daily intervals for incremental models.
         LANDING_DIR="${LANDING_DIR:-/data/padelnomics/landing}" \
         DUCKDB_PATH="${DUCKDB_PATH:-/data/padelnomics/lakehouse.duckdb}" \
-            uv run sqlmesh -p transform/sqlmesh_padelnomics plan prod --auto-apply
+            uv run sqlmesh -p transform/sqlmesh_padelnomics run prod
 
         # Export serving tables to analytics.duckdb (atomic swap).
         # The web app detects the inode change on next query — no restart needed.