validation: tip tooling no longer reads renamed source paths

Fixes the regressions from the entry/compiler renames (2b3c2a7, d318911)
that Astra reproduced at d318911:
- run_refined_dfg.verify_source: a manifest file missing from the checkout
  is a 'Source mismatch' (was FileNotFoundError); the current-checkout
  (Jet scenario) capture hashes the manifest's harness files plus the
  checkout's own 'git ls-files src', not historical src paths.
- time_window_dfg: candidate file list names kernels/blocked.cu.
- test_projected_pairs: the a135252-only harness's runtime_source is the
  historical receipt value (historical_runtime_source) in the receipt
  fixture and the two mocked run_case.main tests; runtime_source itself
  stays tested against the a135252 package (historical_package).
Harness files, pins, manifests and thresholds are unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/validation/time_window_dfg.py

@@ -38,7 +38,7 @@ VARIANTS = ("A", "W", "W1")
 # links). Engineering tolerance: 1e-9 of the interval's summed absolute per-step totals.
 INTERVAL_RTOL = 1e-9
 CANDIDATE_FILES = ("src/CelerisLab/lbm/refinement_stepper.py", "src/CelerisLab/lbm/raw_exchange.py",
-                   "src/CelerisLab/lbm/refinement_tables.py", "src/CelerisLab/lbm/kernels/blocks.cu")
+                   "src/CelerisLab/lbm/refinement_tables.py", "src/CelerisLab/lbm/kernels/blocked.cu")
 
 
 def components(obs):