App Bandwidth Contracts. This container holds named profiles that define
directional (UPSTREAM/DOWNSTREAM) bandwidth limits for application traffic.
Each profile can include four different contract types: DPI application based
contracts (app), DPI application category based contracts (app-category), WebCC
reputation score/risk based contracts (web-reputation), and WebCC category based
contracts (web-category). Each contract entry uses a composite key leaf that
combines the identifier and direction. Bandwidth limits are configured by
selecting bandwidth units (kbits/s or mbits/s) and specifying a bit-rate; the
bit-rate is validated by a YANG must constraint with unit-specific ranges
(256..2000000 for KBITS_PER_SEC and 1..2000 for MBITS_PER_SEC).
The combined total number of entries across all four contract lists (app,
app-category, web-reputation, and web-category) within a single profile
must not exceed 32.