fix: applied limits to HBAR-consumed queries and allowed atomic queries to bypass HBAR rate limiting

[quiet-node]

Description:
This PR improve the HBAR rate limiting mechanism of the relay particularly for query operations.

1. Updated executeQuery to apply HBAR rate limiting more selectively:

   • Queries with zero cost (base cost = 0) are exempt from rate limiting
   • Added support for "atomic queries" (queries that are part of a larger operation like file operations, e.g., FileInfoQuery in createFile(), deleteFile()) which bypass rate limiting
   • Only apply rate limiting when a query has an actual HBAR cost and isn't an atomic operation

2. Enhanced shouldLimit method to handle transaction and query modes differently:

   • In TRANSACTION mode: checks both the total relay budget and the spending plan limits for the specific user
   • In QUERY mode: only checks the total relay budget (ignores individual spending plan limits)

Fixes #3678

[github-actions]

Test Results

 20 files  ± 0  270 suites  +15   40m 43s ⏱️ -6s
631 tests + 2  624 ✅ + 3  4 💤 ±0  3 ❌  - 1 
750 runs   - 65  743 ✅  - 64  4 💤 ±0  3 ❌  - 1 

For more details on these failures, see this check.

Results for commit 167b6a7. ± Comparison against base commit b882f71.

♻️ This comment has been updated with latest results.

[quiet-node]

Closing this PR as not planned. More information is found in this comment #3678 (comment)